it's probably best not to force it. Early in the Reddit migration, frequent posting kept people coming back, but you don't want to turn it into "your" communities. Shifting to quality over quantity is never a bad move either :)
he also has a habit of replying to people without fully reading what they've written, creating long chains where he blames everyone else for his failings. it's ugly.
What's a shame is that, for all of your words, you seem to know very little about WW2 and Nazi Germany. You've reduced it all to basically a straw man so you can win an argument no-one is making. Honestly, if I was a nazi, I'd be insulted by your reductivism. As someone against nazis, it's insulting too.
In the end, it's a lot of words to say you're a) ignorant as hell and b) probably qualify as a nazi
stop saying the truth. it hurts their feelings.