You and many like you keep saying he lost his job over 'unpopular views others didn't agree with'. The sort of thing, as Brendan Eich says, you can leave at the door when you come to work. But it isn't as if Brendan Eich lost his job because he went out for beers with a few co-workers and, in an unguarded moment' said something like 'you know what, that that whole marriage between people of the same gender just doesn't square with my religious faith'.

I wonder if people like you are familiar with what California Proposition 8 was. California courts had already ruled that same-sex marriages were valid under the California constitution and such marriages were already taking place. Prop 8, funded in part by out-of-state conservative religious groups, sought to modify the constitution to define marriage as solely between a man and a woman. That is what Brendan Eich was for and that's what he supported with his money - the legal imposition of a specific belief on a historically discriminated-against minority. It's certainly his right to do so but it's hardly compatible with holding the top leadership and representative position at Mozilla. If you were the leader of a Catholic charity but expressed strong pro-choice views, you'd probably have trouble holding onto your position as well.

As a meta point, speaking of discriminated minorities, you should probably avoid calling people who, however vocally, express views different than yours on the internet a 'lynch mob'.