Deuteronomy 12:30 Take heed to thyself that thou be not snared by following them, after that they be destroyed from before thee; and that thou enquire not after their gods, saying, How did these nations serve their gods? even so will I do likewise. 31 Thou shalt not do so unto the Lord thy God: for every abomination to the Lord, which he hateth, have they done unto their gods; for even their sons and their daughters they have burnt in the fire to their gods.
He also said to observe only those things He commanded to do and not to add or take away from them. So He continues in Dewuteronomy.
Deuteronomy 12:32 What thing soever I command you, observe to do it: thou shalt not add thereto, nor diminish from it.
Can you find from scripture where God instituted any of the “feast days” you celebrate? He did have something to say about them.
Isaiah 1:13 Bring no more vain oblations; incense is an abomination unto me; the new moons and sabbaths, the calling of assemblies, I cannot away with; it is iniquity, even the solemn meeting. 14 Your new moons and your appointed feasts my soul hateth: they are a trouble unto me; I am weary to bear them. 15 And when ye spread forth your hands, I will hide mine eyes from you: yea, when ye make many prayers, I will not hear: your hands are full of blood.
He said to destroy all the ways of the heathen or there would be consequences.
Ezekiel 20:7 Then said I unto them, Cast ye away every man the abominations of his eyes, and defile not yourselves with the idols of Egypt: I am the Lord your God. 8 But they rebelled against me, and would not hearken unto me: they did not every man cast away the abominations of their eyes, neither did they forsake the idols of Egypt: then I said, I will pour out my fury upon them, to accomplish my anger against them in the midst of the land of Egypt. 9 But I wrought for my name's sake, that it should not be polluted before the heathen, among whom they were, in whose sight I made myself known unto them, in bringing them forth out of the land of Egypt. 10 Wherefore I caused them to go forth out of the land of Egypt, and brought them into the wilderness. 11 And I gave them my statutes, and shewed them my judgments, which if a man do, he shall even live in them. 12 Moreover also I gave them my sabbaths, to be a sign between me and them, that they might know that I am the Lord that sanctify them. 13 But the house of Israel rebelled against me in the wilderness: they walked not in my statutes, and they despised my judgments, which if a man do, he shall even live in them; and my sabbaths they greatly polluted: then I said, I would pour out my fury upon them in the wilderness, to consume them.
And lest you think that’s all Old Testament stuff and not relevant after Christ. Paul was still keeping the old feasts but no where is mentioned of any new.
Acts 18:21 But bade them farewell, saying, I must by all means keep this feast that cometh in Jerusalem: but I will return again unto you, if God will. And he sailed from Ephesus.
Jesus kept all of the old feast days commanded by God and taught the apostles to do the same. Then He sent them into the world with this command.
Matthew 28:19 Go ye therefore, and teach all nations, baptizing them in the name of the Father, and of the Son, and of the Holy Ghost: 20 Teaching them to observe all things whatsoever I have commanded you: and, lo, I am with you always, even unto the end of the world. Amen.
No the those who celebrate other “feast days” need to show from scripture where Jesus instituted other feast days that are observed today or consider that God’s disdain for them still stands.
“”And lest you think that’s all Old Testament stuff and not relevant after Christ.””
Do you carry around a bronze snake on a pole in case you get bit by a snake than too?
A bronze snake would be a graven image and pagan yet God Told Moses that people who look upon it would be healed of snake bites
The reality is, there is nothing in making a bronze snake that heals, this OT Scripture was a typolgy of faith and the Crucifixion of Christ that heal sin.
Also, what you don’t seem to realize is that many pagan things borrowed from Christianity. There is a lot if dumb historians that lack evidence to say Christianity borres from pagans
Case in point is forms of Mithraism..
From New Advent.org...
Some apparent similarities exist; but in a number of details it is quite probable that Mithraism was the borrower from Christianity. Tertullian about 200 could say: “hesterni sumus et omnia vestra implevimus” (”we are but of yesterday, yet your whole world is full of us”). It is not unnatural to suppose that a religion which filled the whole world, should have been copied at least in some details by another religion which was quite popular during the third century. Moreover the resemblances pointed out are superficial and external. Similarity in words and names is nothing; it is the sense that matters. During these centuries Christianity was coining its own technical terms, and naturally took names, terms, and expressions current in that day; and so did Mithraism. But under identical terms each system thought its own thoughts. Mithra is called a mediator; and so is Christ; but Mithra originally only in a cosmogonic or astronomical sense; Christ, being God and man, is by nature the Mediator between God and man.