Yet there are groups here that tend to downvote certain not necessarily evil views to oblivion. For example if you support capitalism and in context write your opinion in favour of some events, expect a rain of downvotes or if you dare to criticise Apple. Quite ironic.
I don't see any particular irony. Hacker News has always accepted that downvotes for any reason are allowed, because upvotes for any reason are allowed. It's not surprising that in a contrarian culture, casual downvotes would be commonplace.