He's being a trolling piece of @#$%, thinking (correctly, as it is) that speaking such hate will gain him attention.
Regarding his above statement, his expression is grammatically terrible and difficult to understand. "although I am not completely sure if the holocaust existed" < how can anyone possibly think this given the overwhelming evidence? I think he's not as far from actually being the ignorant piece of shit he role plays as he thinks he is. "many do this as it is seen as cool and fun" < this is exactly the attitude that we need to eradicate. There is nothing cool or fun about these beliefs. At all.
My opinion of such nazi sympathisers, genuine or otherwise, has already been made clear.
But to reiterate, I will not tolerate or humour such in any manner or form, in NS or RL. Nor do I believe we should ignore it. It needs to be eradicated, and all nazi emulating regions destroyed.