A couple of links that are well worth reading
First, How to Improve Feminism in 2014 in Vice (Warning! Do not read the comments unless you want to gawp at sexist idiots). Second, and far more important, this very well-written piece On Toxicity and Abuse in Online Activism, talking about online anger, and why the whole social-justice call-out culture has turned toxic.
It’s long, but it’s worth reading the whole thing. A central point is when the zealots coming from within the social justice movement start to look like the trolls from places like 4chan, something has gone horribly wrong.
I’ve always believed that tribalism is a Very Bad Thing, and one aspect of tribalism is when you turn a blind eye to behaviour from within your own “tribe” that’s just as bad as anything from the “enemy camp”. Sadly, good causes sometimes attract horrible people, you only have to look at all the atrocities perpetrated in the name of religion to recognise that.