The problem with Judaism is that while it once was the authentic religion of God, God abandoned Judaism when Christ was born and formed a new Church. The Romans destroyed the Temple in 70 A.D., and the Jews were dispersed to all parts of the Empire. That was the end of the Biblical Israel, and the modern Israel is a political creation, created with Western wealth and brute force, but not enjoying the legitimacy that Israel had in Biblical times.
The modern Jewish faith is unable to inspire the faith of even the majority of Jews, who reject God in favor of secularism, or even downright atheism. They consider themselves Jews, but they do not believe in the Old Testament, and they anger God with their faithlessness, which is probably why so many bad things keep happening to them.
So Jews would be better off if they realized that Jesus of Nazareth really was the Messiah they were waiting for, and another Messiah is not coming.