Their downfall is with respect to their "Oral Torah", which of course you have already rejected, and is best defined as the Talmud, of which there is not just one version, and is the writing of the scribes, which makes the law a lie per Jeremiah 8:8. If you want to become "perfect" according to Yeshua, per Mt 19, you will have to keep all the 10 Commandments, and then sell what you own and give it to the poor. As for the Jewish sects of the time, the Pharisees and the Sadducees, he said they should confess their sins, repent, and then produce good fruit in line with their repentance, or they can expect to be cut down and thrown into the fire. (Mt 3). Their teachings he referred to as leaven, which would be a reference to their hypocrisy. The hypocrisy of the Jews of today would be better understood by you than me, as I don't participate in any religion, and know very few Jews, as I am from middle America, where there are Jews, but not that many in number. I am more familiar with the leaven/hypocrisy of the Christians. The Jews I am familiar with are in the news, such as Bernie Madoff, and Charles Schumer of the US Senate. Both low level guys, who hopefully aren't representative. Much like Biden, and Pelosi are Catholics, of the lowest level of personage, except in the eyes of California type Progressive feminist who actually vote for those people. Well, they get what they vote for, crime, drugs, and high prices.