Interesting. I'm gay and my sister is lesbian/gender fluid. She has a great relationship with our dad. Me on the other hand, not so much. Hasn't been around in my life since I was ten. My step brother is gay and his dad died when he was 9.
I think it's more like, a child being homosexual caused the father to have problems with his child (aka one example of daddy issues) not the other way around.
I've thought about this too tbh. I've never met my dad and my step-dad was a complete asshole to me growing up. He'd always hurt me verbally and physically when my mum wasn't around. I was terrified of him at one point. Pretty sure he was the main cause of my social awkwardness/anxiety.
It appears that I missed a real relationship with my dad. I mean he has always loved me but he never involved himself into his "father" role. Basically my mom was the real boss...
I don't think this is linked at all. I think you've got the cause/effect relationship round the wrong way, conflict is most likely linked to the father's frustrations with the son's non-conformity to traditional masculinity and later with his homosexuality.
No, it's the other way around. A lot of fathers and gay sons have difficulty building connections because the fathers know they're gay (at least subconsciously) and the son doesn't connect with them. Notice that many of the gay men who had good relationships with their father were in a situation where parents had no idea?