Wait, wait, hold on. Folks, this man isn't a politician, he isn't a social crusader, he isn't using his position as a platform. At worst, he's rich. He hasn't taken the throne, or even government office; he's the CEO of a private corporation that makes web browsers of all things. Now, sure, he might be against gay marriage. And you might disagree, and have a variety of principles to back your position. But why do we…
Would we have the same controversy if Brendan voted Tea Party (but only privately)? If he were against abortion? If he didn't believe NASA needed a bigger budget (or that it did, if you lean the other way)? Yes. Yes. Yes. This is America in 2014. If somebody holds a politically incorrect position, they must be destroyed: their employer must be named, shamed, and pressured to fire that person. If that person runs a co…
There's personal beliefs and then there's giving financial support to crush someone else's. That puts things on a different scale. Abortion in the examples would probably be the closest, but the most 'understandable' part of that is at least it involves termination of life, which is by itself controversial. Prop 8 was about materially preventing families from officially forming. That puts it in a different league of just hatred/bigotry.
A CEO IS the public face of an organization. And that organization, Mozilla, is one whose principal aim is to create an open and transparent substrate for the exchange of ideas and services. That is at odds with his own past actions.
The products and services a company creates is reflective of the people inside of it. His actions have made it difficult for LGBT members to join his organization (and possibly anyone else who is sensitive to such issues). This is ESPECIALLY true for anyone who will routinely be interacting with him. The lack of minorities in tech is already a big problem, and reducing that likelihood at one of the few principal stalwarts of the Internet is a missed opportunity.