It happened, due to the technological backwardness of that time when compared to today numbers could be slightly off but it's around 6 million jews dead! And i am not even counting the other millions homosexuals, communists , and mentally ill!
Anyways, if you tried to jail socialists then you're a nazi simple as that. You try to jail opposition and oppress people who don't follow your ideology then you are no better than Hitler. What's next? Kill all socialists?
Looks like you are a Nazi Japanball. At least according to Leibstandarte (Vengeance).
People can believe whatever they want but they can't deny holocaust, it was a horrible event where millions died, i am not even talking about other millions of germans hitler sent to their deaths.