Expecting a tolerant person to be blindly tolerant (of anything) is an adolescent argument. Tolerance is not a binary state, and has never meant a binary state.
why are there so many neo-nazi sympathizers on hackernews...
I'm not sure it's "neo-nazi sympathisers" as much as "oblivious young white male libertarians who don't realise the bubble they live in." Admittedly they do tend to sound the same when it comes to "censorship" but I think the distinction helps.
Talk about proving his point... or is this sarcasm?