[hnbad]

No, he isn't saying that. The context was "children are taught why Nazis are bad but now people are voting for Nazis" and his response was to say people were brainwashed to defend going against their interests.

He may not be saying this to imply that the Nazis would have been acting in the interests of the voters but that's what the notion that teaching children Nazis are bad is brainwashing (to allow the government parties to go against the interests of their voters) strongly suggests. Couple this with a comment history of being vocal against "economic refugees" and a German political context of the AfD heavily using migrant scares in their rhetoric and it's entirely legitimate to challenge this statement.

It's also worth mentioning that AfD politicians have not only defended the SS but also loudly complained about Holocaust remembrance and downplayed the extent and significance of the Holocaust.

Your reply completely ignores that he deliberately used the word "brainwashing" which the comment you replied to called out. Intentionally or not, your reply demonstrates a motte-and-bailey (the bailey being that teaching about the Third Reich is brainwashing, the motte being the content of your reply).