It's endlessly fascinating to watch the Left shoot itself in the foot by their compulsion to "express their feelings" about affairs like Milo Yiannopoulos's upcoming book. People keep pointing out to them that such reactions are counterproductive; obviously Milo's book has gotten a heap of free publicity since it was announced yesterday, but they really can't seem to help themselves.
It occurs to me that this could be related to another long-standing observation about the leftist-mindset: liberals, people have often observed, judge policies by their inputs while conservatives judge them by their outputs. For instance, liberals will lament when not enough is being spent on something they like, such as education; conservatives prefer spending as little as possible, but are upset when the results are unsatisfactory.
It's a matter of short-term thinking, I suggest. If you only see as far as the good feeling you get when you do something with good intentions (or, in the case of their heads exploding over Milo's book, expressive intentions), then the actual results don't matter. Thus, they not only won't take advice on ending (e.g.) protests that only make them less popular with voters, they won't even see the point. They don't see the protest as a means to an end, but as an end in itself.
Surprising that they ever win elections at all.