Just to Godwin the thread...
There aren't many negative comments about Hitler on neo-nazi websites, but that doesn't mean opinion is universally favorable.
People gravitate towards fora where they can interact with people they agree with. Echo chambers are a thing.
This is why you see mostly positive opinions on the forums, it's like wondering why people like chess in a chess forum. People here are gonna like ED because it is a sub-forum about it.