It goes back to Christian and Islamic laws against charging interest, money handling, and usury etc. Relegated to the jobs Christians/Muslims literally wouldn't do Jews were often involved in money lending. When the economy is good there was no problem. When it's bad... you blame the money men.
The "Christ killer" argument is a little more saucy. It ignores the fact Jesus willingly died and it was actually Roman's that killed him. Selling out your mates is bad. Omniscient Jesus knew he was being sold out and let it happen at the same time... huh.
While I may not support funding Israel to the tune of billions I will say not every jew is responsible for the actions of a nation state. Few people even in Israel directly influence the actions of their govt. Most people just want to be left alone and worry about their family. In this we are all similar.
My only hope is we ramp up oil production even more, withdraw from the middle east, and let NATO handle their own energy concerns.
Doesn't even need to be so complicated. No one holding any kind of dual citizenship should be allowed in office at the highest levels. It's one of those, you're either in or you're out kinda deals.