I'm not saying it isn't a legitimate, serious issue. But the echo/amplification effect in some corners (i.e. primarily Reddit and HN) is really fascinating. Kind of a "I feel strongly about a thing, because so many people I interact with feel strongly about the thing" sort of thing.
Of all the worthy issues out there today, I'm not sure why Reddit and HN has fixated on this particular one to the extent that they have. But I'm fairly sure that validation-reward effect helps to ratchet up the intensity. You tend to receive a lot votes, likes, etc for commenting in agreement, and I suspect that feedback loop has an impact.
Once again, not speaking in opposition here (God forbid! Pitchforks down!). It's just interesting to watch classic "flash mob" and "moral panic" cycles play out in the new medium.