I agree with you, US Republicanism is completely incompatible with the healthy existence of gay and queer people as understood by the communities in for example San Francisco (where I am from). There must be gay republican communities in other areas, but I'm sure more west coast queer communities would consider those republican gay (prob not queer) communities to be repressive and unhealthy.
It's a shame people cannot relate to what you are saying, and plenty of evidence that even liberal Silicon Valley (assuming it has an outsized influence on this comment thread) has a lot of growth needed before queer people can really be appreciated in tech circles.
In general, having opinions and keeping them to yourself is fine. Being shitty to your colleagues because of it is generally not. And publicly threatening or attacking others is not. It's not about your beliefs, but what you do with them.
A fairly prominent LGBT person, Latrice Royale, at one point did not support gay marriage. That doesn't mean that I agree with that position, nor does that mean the majority of gay people do or should.
As a gay man it would be completely unconsciable to support Republicanism as it exists today, because the overwhelming majority of people in the party are somewhere between apathetic and enthusiastic about denying my rights to life, liberty, and the pursuit of happiness.