If these employees are such bigots and fascists, that they can't fathom someone having a different opinion to their own, they should resign and work elsewhere.
Mozilla is a technology company with the mission to promote a free and open web. If these employees believed that Mozilla was some kind of political organisation, they are wrong and have been deluding themselves.
Labelling the people who criticised Eich as fascists is as bad as calling him one for his beliefs.
Marriage equality? So why doesn't the campaign include polygamous families? They exist, they have kids, they even have TV shows, and there has been a cultural history of polygamy around the world for thousands of years until modern times.
The campaign for gay marriage is exactly that, gay marriage, but it is not a campaign for civil rights for everyone, because if it were, it would support the right for polygamous marriages to be recognized.