For anyone desiring true facts:
Maybe you will understand a secular definition of Judaism from Wiki. "Judaism (originally from Hebrew יהודה , Yehudah, "Judah"; via Latin and Greek) is the religion of the Jewish people. It is an ancient, monotheistic, Abrahamic religion with the Torah as its foundational text." That existed long before any Pharisees appeared. It was given by God through angels at Mt. Sinai. The degree to which anyone kept the religion or not didn't change it's holiness. Jesus kept the Torah perfectly. That meant He kept Judaism perfectly, but rejected Phariseeism.
Romans 7:7-12 (KJV)
7 What shall we say then? Is the law sin? God forbid. Nay, I had not known sin, but by the law: for I had not known lust, except the law had said, Thou shalt not covet.
8 But sin, taking occasion by the commandment, wrought in me all manner of concupiscence. For without the law sin was dead.
9 For I was alive without the law once: but when the commandment came, sin revived, and I died.
10 And the commandment, which was ordained to life, I found to be unto death.
11 For sin, taking occasion by the commandment, deceived me, and by it slew me.
12 Wherefore the law is holy, and the commandment holy, and just, and good.
Nothing added by scribes (lawyers) in league with Pharisees (politicians) and some corrupt priests could change the Pentateuch. Not even wicked Chief Priests could change what was written. Anyone following them added corruption to holiness. We find some of those in the NT exhibited a right attitude toward Jesus and the apostles.
Amos came before Israel and Judah were taken into 70 years of captivity. Did you know God promised them He would return, and He would return to them back in their own lands? It took that captivity to purge them of their sins. Well, He did and they did what He promised Jeremiah et. al. Read the last three prophets of the OT to learn how God restored everything, and made no changes to the religion of the Jews through Jesus' time, not since. They lost their temple again, but it will be rebuilt, aand their restored nation will continue on to celebration once purged of sins in the Tribulation. That holy religion has remained so, best observed by Orthodox Jews considering the lack of a temple and sacrifies on it's altar. They will soon learn why God stopped that practice once the blood of Jesus was applied 2000 years ago.
It is playing into the hands of Satan to say anything of God is false. You are bordering blasphemy of the Spirit. You are better off remaining silent about things not understood. Eternal salvation doesn't come by way of Judaism, but that religion serves the tenets of God's exposure of sin as explained by the Apostle Paul in Romans 7 and other places in scriptures.
The Church worldwide has suffered much like the Jews due to sins and ignorance, weakness, and oppressions. Let's not be haughty about that.