Homophobe or Racist – which do you prefer?

As a writer you have to live inside other people’s heads for much of your life. I’m a bloke, have been all my life, but I find myself inside the minds of my heroines. The creative mind sits inside someone I will never be – but women (obviously) face many of the same issues as men and I can empathise with many of the others!
In much the same way I sometimes find myself inside a bigot, a rapist, a killer – trying to understand them, trying to make their voices plausible, their actions consistent. And I don’t always know if I am doing it right!
If a bigot hates gays does it follow that he/she also has to have a problem with black people or Jews or the Welsh? If they don’t ‘have to’ be universally bigoted is there somewhere I can go to find out the correlation. Do 90% of KKK members regularly protest against vegans or is it only 5% or not correlated at all? Does the national census track this? Do Which? produce a report? Who knows these things?
I’m being deliberately flippant about this because it is all in my head. If I want to make my baddie even worse I will throw some casual racism into their dialogue because I see that as a bad thing in a person. But if I make them racist can they also be gay – do people with one unjustified subjectively dodgy bias automatically have to have more? Does a homosexual racist criminal have to hate straight people?
Sometimes I think it is better to steer away from such questions but sometimes a writer just can’t. Characters develop with a story and sometimes they aren’t consistent and sometimes, to be blunt, they turn out to be complete b**tards!