Imagine you're in Germany and because of some random time travel shit you find yourself back to the year 1939

This. Plus. even if you do get them to change policy, there's no guarantee that the new policy would work better. Plus, once you've diverted history once, your books are pretty much useless.

WOW I JUST BOUGHT YOU 300 REDDIT GOLD ALSO ORANGE MAN BAD

Good luck cause they think you’re a spy for knowing too much.

Why does everything have to be sexual with the left?

I guess I'd turn myself in to the SS or equivalent, show them the books, and then just say exactly what happened in MY timeline, as accurately as possible. Presumably the weirdo American time-man would attract attention from higher ups eventually.

So you're saying that the nazis weren't a bunch of drug fuelled failed artists, chicken farmers who were basically gangsters? Please do enlighten us all with how they weren't just a bunch of retards who got lucky.

Also, depending on where you live, don't you run the risk of phasing yourself out of existence, if you help the fucking panzers roll over your country?