Don’t kill Hitler as an infant. Not for moral reasons, but you want to go for early college era Hitler, he was an edgelord, incel, douchebag with a farting problem that wore leather lederhosen and carried around a riding crop. He was that guy.

Just find him on campus and bash his head in with a baseball bat in front of everybody, people would celebrate you for killing Hitler without ever coming close to the holocaust and nobody would be heartbroken over a dead baby.