Yes I am aware this is not the RP stream

1. Offer him good art advice (he passes art school and doesn’t become a fascist dictator)
2. F**king shoot him. (no Hitler, no WW2)
3. Say his art is nice, befriend him, then tell him you’re Jewish (maybe he’ll remember you sooner and not hate Jews).

1. Goes exactly as you'd think
2. Actually, it would be likely without Hitler, the Nazis would still come to power under someone like Goering or Himmler, and the war would still happen
3. He was very anti-Semetic even back then