When you went back in time to prevent Hitler's entry into art school so that you wouldn't have to analyse his overrated aquarrells in art class anymore.
I've long ascribed to the theory that, if time travel is ever invented, no one kills Hitler because WWII was inevitable and Hitler actually bungled a lot of key decisions. I'm praying Trump is the same. Maybe this is the most painless purging of nationalist sentiment across the timelines.