He didn't get a fair trial, he was released when there was significant evidence that he worked at a camp that exterminated people.

No he did not, the trial was stacked against him, and used eye witness testimony, who is already flawed, but eye witness testimony from senile old people, who has been through some horrifying shit, and for that reason only sees red. And also, key evidence for his conviction, is that he looked like him, based on a decades old photo, seriously dude? That's not evidence enough to say he was Ivan the Terrible. He shouldn't have been sentenced to begin with, but he was because the trial wasn't fair.

The trial in Israel wasn't about him working at a death camp, it was about him being a specific person, which he wasn't, and he was still sentenced to death. After YEARS, his charges were dropped by the supreme court, because he wasn't Ivan the Terrible, and new evidence supported that. That was the charge on him, not whether he worked at a death camp. It wasn't until Germany, decided to actually charge him for a crime they could prove he did, that he was sentenced for actually working at a death camp.

You question him watching the same documentary as you, but you're the one who apparently didn't watch the terrible evidence they provided that lead to him getting death by hanging and what he was actually charged with.