You know, antisemities baffle me, in a lot of ways.
No, just because I have a Jewish last name does not mean I am good with money/taking over the world/personally nailed the hippy idiot to a stick/have duel loyalties to a country that I actually rather hate.
Believe me, if I was part of a global conspiracy of any sort of power, insulting me in such a way would be a death sentence. Since you are still alive, I am not that powerful. I am, however, likely to punch you in the throat.