I'm really sorry your dad is like that that's really horrible and I'm not sure what to say maybe you can change his mind but I'm not sure

I know the newer generations are much harder in the adults than children because of all the changes and such, but they need to accept the change as they always tell us to. People are becoming more open for better and worse, people are accepting of themselves now more than ever, everyone should be supportive of that fact. Love is love no matter how you shape it, if people can't get behind that, then that is their problem, they just aren't taking their own advice.