I've come to learn over the years that biggest driving force behind homophobia is not irrational fear or ignorance, but irrational disgust. The most prevalent type of homophobia are the ones who genuinely believe that is something that's disgusting, gross, and abnormal human behavior. They're fully aware that it won't affect them in any way and they're fully aware that oppressing these people will cause them great harm, but they will pursue it anyway because they think it's for the greater good. They think it's something necessary to achieve a clean and healthy society that's free of filth. This type of homophobia can't be resolved with simply logical reasoning because often times, the underlying opposition isn't even coherent, it's just an emotional reaction.