I've heard people say something like "it's far too soon to tell what impact if any this rather dramatic change to the traditional definition of marriage will have on society, so perhaps we should take things slow and not rush to implement it everywhere simultaneously."
This seems like a reasonable enough position to me -- although I don't share it because I think the injustice to the individuals affected outweighs any potential drawbacks I can come up with, sometimes the law of unexpected consequences surprises us in interesting ways.
I've also heard people say "judge-made law causes resentment and entrenchment in a minority of the populace and leads to long-term conflicts (see, for instance, Roe vs. Wade). Therefore, while it'd be nice to have gay marriage everywhere simultaneously, we should wait to introduce it in a jurisdiction until we have an electoral majority there."
Again, this seems like a reasonable enough position to me, although not one I personally share.
Brendan Eich would be just fine as CEO in a more civil society where people are capable of separating personal opinions and professional actions. My personal dislike of his 'resignation' comes from a desire to have that (sadly imaginary) society instead of the one we've got. If I can work peaceably with a bunch of left-wing people, y'all should be able to work just fine with Brendan.