That's right, God condemns carnal Israel throughout the Bible. They are against God and that is why they fell. There is a remnant of Jews who believe Christ, but it is only a fraction, most of them are against Christ. The apostate nation of Israel is against Christ and is also Babylon the Great. God will punish them according to the Book of Revelation.
I am not saying that the God of the Jews is different, Jesus is saying it. He calls their God the devil and their synagogues satanic. If you say you believe in the same God as the Jews, then you can believe that. But Christians have another God, their God is the Trinitarian God.
So you think it was just bad luck that Jesus died? Yes, you're right, the same God that condemns Israel throughout the words of the prophets, is the same God who delivered the suffering servant to die for our sin. And used His own people to carry it out. It's the same God throughout the Scriptures.
God bless,
Ted