I'm not active on Twitter and I think I've missed the SJW movement and it's effects. Perhaps the problem is that complex nuanced ideas can't be expressed in 160 characters?
IMO, why one becomes incited in the first place comes from the drunken sense of control one feels when all they think they are revealing is their gravatar/profile. However, it is relatively easy to reciprocate with a "herd agenda" of one's own and launch an attack without the need to extract any real facts to damage the target's reputation.
If I were to insult an individual in front of a group all physically present, I would most likely be doing so in a way that the "herd" clearly understands my message rather than the target. I have always despised this type of thinking as many do, yet it has become increasingly popular.