Hey there, thanks for the mention. 🙂
Anyway, I think you’re on to something. Dehumanization of “the other” certainly isn’t a new thing, but neither has it gone away, so the social ills it causes just morph with the times.
Also relevant, I think, is that the Internet has been an amazingly powerful force for democratizing communication. Many people have a voice now that didn’t before. That’s a great thing, I think, but a side-effect is that it can produce a sense of entitlement where people feel that they not only have the right to speak, but also the right to be listened to. Their response, if their insights are ignored, can be to escalate until they get noticed, one way or another.