[aqme28]

Also I don't think he was fired for his tweets, but for his opinions.

Put another way, he wasn't fired for tweeting hateful things, but for having those opinions. All his tweets did was show the world that he was this hateful person, one who shouldn't be in a position of power.

[intortus]

Nothing happened merely because he held opinions. It was when he began expressing them in a harmful and embarrassing manner that it became a problem for him.