I don't doubt that he was capable of such a thing but I have no recollection of that from the history I've read and a search online and skim of his Wikipedia page isn't providing anything to back that up either. Do you have a source or specifics I can search up to confirm your claim?
Wikipedia is just full of arrests and deaths, not pardons.
It makes it easier to convince friends of the Trump/Hitler parallels if I can back it up with sources.
Sure.
https://www.bbc.co.uk/news/articles/c4g32yxpdz0o