The right / left identities get a little blurred, imo, when we're talking about evil people like Hitler, Stalin, Mao, etc. They're all evil dictators. They used whatever was at their disposal to gain and maintain power. I don't see any benefit in attempting to put them into political identity boxes, as the liberals here in the US are so fond of doing when it suits whatever point they're trying to make at any given time.
And once again, your claim that American right wingers dream of killing left wingers, is so patently ignorant, and just flat out wrong, that your credibility has to be questioned.
Wait... what credibility?