Even if this were true (which it isn't), the slippery slope argument most definitely applies here. Are you going to reject the veneration of our founding fathers because they held slaves? What if a company has middle managers who are against same sex marriage, or engineers? Do we boycott them as well? You are advocating for intellectual puritanism in the name of protection of diversity -- an utterly incoherent position.
Also, we're talking about political speech from many years ago, for a cause that the majority of Californians passed -- and, lest we forget, President Obama, liberal hero he is, did not support gay marriage until 2012. Many, many religious conservatives (hundreds of millions of them, in fact) would argue against your conflation of anti-gay marriage with anti-gay. And just because you seem unable to fathom dissenting views on this issue doesn't mean they don't exist.
Also, we're talking about political speech from many years ago, for a cause that the majority of Californians passed -- and, lest we forget, President Obama, liberal hero he is, did not support gay marriage until 2012. Many, many religious conservatives (hundreds of millions of them, in fact) would argue against your conflation of anti-gay marriage with anti-gay. And just because you seem unable to fathom dissenting views on this issue doesn't mean they don't exist.