What was the title of the post? Something about tolerance, if I'm not mistaken.

So why not comment on the post, hmm?

Absolutely key point to bear in mind is that if you harangue someone about a problem when you're not in a better position to judge on that particular issue, you're being an asshat.

Oh, of course. If you genuinely have good reason to believe you know better than (group) beyond the evidence you have that you are right then it is perfectly reasonable to act on it. But since most of the time you're probably not in that position, it seems to me that cultivating tolerance is a good idea.