Eich's enemies argue that intolerance of intolerance is not intolerance. But of course it is. By toppling Mozilla's CEO, activists sent the message that having opposed same-sex marriage -- a mainstream position also held by Barack Obama just six years ago -- can be a career killer. It's not enough to beat the opposition at the ballot box or in court; you have to ruin opponents' grass-roots supporters personally, make people afraid to oppose you.
Of course, they don't have to ruin everybody who gave money to Prop 8. All they have to do is flame a few random supporters, trash their reputations and kill their careers -- as an example to anyone who might entertain the same position. Who needs tolerance when you can dish out fear?