I'm not sure how I feel about this one. On the one hand, Brendan Eich had some beliefs that were against Mozilla's core values, but on the other hand we just showed that when a mob on the Internet wants something - they get it. It's scary because this mob has global reach, unlimited power, but isn't always right.
I don't think that this follows. In this particular case, someone was promoted to a role which many felt was incompatible with his personal views; they made that known, and the person in question stepped down. That's kind of how things should work in a community enterprise.
That said, I understand he's received wildly disproportionate abuse, like death threats. That's totally unacceptable, and frankly I'm surprised that anybody feels that strongly about the issue.