Judaism and the Feasts of God are not cut from the same fabric. You can observe the Feasts of God if you so desire, there is NOTHING WRONG WITH THAT! If you observe manmade holidays such as Christmas, Easter, Lent, Ash Wednesday there IS MUCH WRONG WITH THAT!
The 10 Commandments are NOT legalism nor are they suggestions! The 10 Commandments are what we refer to as the MORAL LAW and when people who have NOT heard the Gospel, or the MORAL LAW, guess what? God Himself put it in us before it was even given on Mount Siani and their own conscience will bear record against them.
Isa 48:1 Hear ye this, O house of Jacob, which are called by the name of Israel, and are come forth out of the waters of Judah, which swear by the name of the LORD, and make mention of the God of Israel, but not in truth, nor in righteousness. Isa 48:2 For they call themselves of the holy city, and stay themselves upon the God of Israel; The LORD of hosts is his name. Isa 48:3 I have declared the former things from the beginning; and they went forth out of my mouth, and I shewed them; I did them suddenly, and they came to pass. Isa 48:4 Because I knew that thou art obstinate, and thy neck is an iron sinew, and thy brow brass; Isa 48:5 I have even from the beginning declared it to thee; before it came to pass I shewed it thee: lest thou shouldest say, Mine idol hath done them, and my graven image, and my molten image, hath commanded them. Isa 48:6 Thou hast heard, see all this; and will not ye declare it? I have shewed thee new things from this time, even hidden things, and thou didst not know them. Isa 48:7 They are created now, and not from the beginning; even before the day when thou heardest them not; lest thou shouldest say, Behold, I knew them. Isa 48:8 Yea, thou heardest not; yea, thou knewest not; yea, from that time that thine ear was not opened: for I knew that thou wouldest deal very treacherously, and wast called a transgressor from the womb. Isa 48:9 For my name’s sake will I defer mine anger, and for my praise will I refrain for thee, that I cut thee not off. Isa 48:10 Behold, I have refined thee, but not with silver; I have chosen thee in the furnace of affliction. Isa 48:11 For mine own sake, even for mine own sake, will I do it: for how should my name be polluted? and I will not give my glory unto another. Isa 48:12 Hearken unto me, O Jacob and Israel, my called; I am he; I am the first, I also am the last. Isa 48:13 Mine hand also hath laid the foundation of the earth, and my right hand hath spanned the heavens: when I call unto them, they stand up together. Isa 48:14 All ye, assemble yourselves, and hear; which among them hath declared these things? The LORD hath loved him: he will do his pleasure on Babylon, and his arm shall be on the Chaldeans. Isa 48:15 I, even I, have spoken; yea, I have called him: I have brought him, and he shall make his way prosperous. Isa 48:16 Come ye near unto me, hear ye this; I have not spoken in secret from the beginning; from the time that it was, there am I: and now the Lord GOD, and his Spirit, hath sent me. Isa 48:17 Thus saith the LORD, thy Redeemer, the Holy One of Israel; I am the LORD thy God which teacheth thee to profit, which leadeth thee by the way that thou shouldest go. Isa 48:18 O that thou hadst hearkened to my commandments! then had thy peace been as a river, and thy righteousness as the waves of the sea: Isa 48:19 Thy seed also had been as the sand, and the offspring of thy bowels like the gravel thereof; his name should not have been cut off nor destroyed from before me. Isa 48:20 Go ye forth of Babylon, flee ye from the Chaldeans, with a voice of singing declare ye, tell this, utter it even to the end of the earth; say ye, The LORD hath redeemed his servant Jacob. Isa 48:21 And they thirsted not when he led them through the deserts: he caused the waters to flow out of the rock for them: he clave the rock also, and the waters gushed out. Isa 48:22 There is no peace, saith the LORD, unto the wicked. Isa 49:1 Listen, O isles, unto me; and hearken, ye people, from far; The LORD hath called me from the womb; from the bowels of my mother hath he made mention of my name. Isa 49:2 And he hath made my mouth like a sharp sword; in the shadow of his hand hath he hid me, and made me a polished shaft; in his quiver hath he hid me; Isa 49:3 And said unto me, Thou art my servant, O Israel, in whom I will be glorified. Isa 49:4 Then I said, I have laboured in vain, I have spent my strength for nought, and in vain: yet surely my judgment is with the LORD, and my work with my God. Isa 49:5 And now, saith the LORD that formed me from the womb to be his servant, to bring Jacob again to him, Though Israel be not gathered, yet shall I be glorious in the eyes of the LORD, and my God shall be my strength. Isa 49:6 And he said, It is a light thing that thou shouldest be my servant to raise up the tribes of Jacob, and to restore the preserved of Israel: I will also give thee for a light to the Gentiles, that thou mayest be my salvation unto the end of the earth. Isa 49:7 Thus saith the LORD, the Redeemer of Israel, and his Holy One, to him whom man despiseth, to him whom the nation abhorreth, to a servant of rulers, Kings shall see and arise, princes also shall worship, because of the LORD that is faithful, and the Holy One of Israel, and he shall choose thee.
Isa 50:1 Thus saith the LORD, Where is the bill of your mother’s divorcement, whom I have put away? or which of my creditors is it to whom I have sold you? Behold, for your iniquities have ye sold yourselves, and for your transgressions is your mother put away. Isa 50:2 Wherefore, when I came, was there no man? when I called, was there none to answer? Is my hand shortened at all, that it cannot redeem? or have I no power to deliver? behold, at my rebuke I dry up the sea, I make the rivers a wilderness: their fish stinketh, because there is no water, and dieth for thirst. Isa 50:3 I clothe the heavens with blackness, and I make sackcloth their covering. Isa 50:4 The Lord GOD hath given me the tongue of the learned, that I should know how to speak a word in season to him that is weary: he wakeneth morning by morning, he wakeneth mine ear to hear as the learned. Isa 50:5 The Lord GOD hath opened mine ear, and I was not rebellious, neither turned away back. Isa 50:6 I gave my back to the smiters, and my cheeks to them that plucked off the hair: I hid not my face from shame and spitting. Isa 50:7 For the Lord GOD will help me; therefore shall I not be confounded: therefore have I set my face like a flint, and I know that I shall not be ashamed. Isa 50:8 He is near that justifieth me; who will contend with me? let us stand together: who is mine adversary? let him come near to me. Isa 50:9 Behold, the Lord GOD will help me; who is he that shall condemn me? lo, they all shall wax old as a garment; the moth shall eat them up. Isa 50:10 Who is among you that feareth the LORD, that obeyeth the voice of his servant, that walketh in darkness, and hath no light? let him trust in the name of the LORD, and stay upon his God. Isa 50:11 Behold, all ye that kindle a fire, that compass yourselves about with sparks: walk in the light of your fire, and in the sparks that ye have kindled. This shall ye have of mine hand; ye shall lie down in sorrow.