When have White Americans thank Jewish people for all the nice things Jewish people have done for them?

How about every single day? Only in a White majority country, will you find the government making it a crime to question Jews holding a lot of wealth or institutional power.

https://www.state.gov/defining-anti-semitism/

Making mendacious, dehumanizing, demonizing, or stereotypical allegations about Jews as such or the power of Jews as collective — such as, especially but not exclusively, the myth about a world Jewish conspiracy or of Jews controlling the media, economy, government or other societal institutions. Accusing Jews as a people of being responsible for real or imagined wrongdoing committed by a single Jewish person or group, or even for acts committed by non-Jews.