I think this issue has crossed a threshold. 61% of young Republican leaning Americans (18-29) support marriage equality. The issue has an obvious trajectory and end point, which means it has shifted in public perception from a "political issue" to simple intolerance, like racism or sexism.
There are still organizations in the US that consider "race purity" a political issue, but the vast majority of the country just considers it intolerance and hate.
Just a short time ago (1986) 1/3 of Americans considered interracial relationships "unacceptable"... today, 1/3 of Americans have a family member in an interracial relationship, and the vast majority consider it fine. It doesn't take long for something to shift from a political issue to a non-issue -- and if you are on the wrong side of history, you will called out.
My point being, I consider this no different than ensuring your CEO didn't donate to the KKK or any other hate group. Technically donating to the KKK is political speech, and you have every right to do it -- but you don't have a "right" to be CEO of Mozilla in spite of it.