So, if he is a time traveler, why didn’t he go kill Hitler when he was a young layabout in Vienna? Could have made it look like an accident. Doesn’t he have a social conscience? He could have saved millions of lives.
Your comment made me recall a short story on the web where a time traveler went back in time to WW1 and killed a French artillery soldier who became the dictator of a resurgent France that conquered all of Europe. But when the artillery soldier was killed then he didn’t fire the shell that would have killed a German corporal...
In the prior timeline a guy named Hertzmann came to power and killed a million Jews.
So this time traveler guy went back and killed Hertzmann resulting in Hitler's rise to power and the death of six million Jews.
There's no chance he's going to go back and kill Hitler for fear things will only get worse.
Because Jeb told him it was all taken care of already.