Wow! So many views on one subject. The term 'Judaizer' was first used when Antiochus Epiphanes created a law
that forbade anyone from following the laws that God had laid down, whether you were a Jew or Gentile convert. If you circumcised your child, you died. When you read scripture, what were the new converts doing? They were zealous for the law (Acts 21;20), still keeping the Sabbath and the other yearly Sabbaths. This is in line also with what the Messiah stated. Nothing will disappear from Torah until heaven and earth are passed. Malachi in chapter 4 reminds the saved ones who are walking on the ashes of the wicked to remember the laws of Moses and the statutes and the judgements. Isaiah 65 and 66 talk about the King returning to punish those who eat swines flesh and have abominable things in their pots.
The Sabbath was a eternal sign between God and His people. Are we not engrafted in? According to Hebrews, the renewed covenant was made with the same people that the old covenant was made with. The gates of Jerusalem each have a tribe written on them. If I am to engraft myself in to them (the House of Judah and the House of Israel) wouldn't I keep the same laws as they do? Thats what Moses says. If there were foreigners among them, it was the same law for everybody.
Can I keep the law perfectly? No, I am just as sinful as the next guy, but I believe thats where grace comes in.
One of the biggest sayings Christians have is WWJD. Well we see Him keeping the law, and the feasts and doing what I cannot do. He took my place. Now through grace, I can be saved. In Hebrews where it does talk about the new covenant, it mentions the law twice and grace not once. The bible cannot contradict itself from one end to the other, and if we throw all the Jewish stuff out, it will contradict itself from one end to the other. I am reminded of just before Stephen was stoned. They accused him of saying Jesus would destroy the temple (He did) and that he was trying to change the customs of Moses. He wasn't. This is what the churches today teach. The laws of Moses were done away with. The only trouble is, the New Testament says these were brought on by false witnesses. In other words Stephan was not teaching that.
I am always open minded and not saying I am completely correct in everything, but when I take the bible as a whole, the law just seems to stand out, not that I can ever keep it perfectly. The Greek word for Torah, was translated as nomia or nomos, and it is interesting to read what the Messiah said the people He tells that "I know you not" do not have. He also states that "if you love me, keep my commandments" Thats is pretty plain. I have often asked teachers in different churches that if some laws changed and some didn't, how do I know as a Christian trying to do what pleases God because I love Him which laws apply and which ones don't? No one has been able to answer me. Even the one they use about the Sabbath (Acts 20;7) the Greek word used is 'Sabbaton'. Where the word 'Easter" is used in the KJV, the Greek word is for Passover. Easter, Christmas, and all the other pagan sun god worship festivals have been Christianized for us to worship with. Is not this exactly what the bible tells us not to do? Instead of following Gods festivals and His time clock, man looks to pagan festivals and the solar calendar. Many people think that Passover has been completely fulfilled since the Messiah was the representation of the lamb. Luke 22:16 states that it will be fulfilled in the New Kingdom. It has a future fulfillment. These are just my thoughts. In my humble opinion, if you are not looking at the scriptures with a Hebraic mindset, you will miss a whole lot.