If you do not state the Holocaust as the worst atrocity in history, you will be referred to as an anti-Semite. If you want to know who controls you, just look to who you aren't allowed to criticise.

Generally speaking, few people would ever agree with Nazis actions or ideology. Sadly though, many still agree with hardcore communism, or are living in a communist state that prohibits any criticism. So these guys aren't going to say a bad word about their predecessors evil deeds.