Black and white vs gray

Well, the last two posts had lots of gay-supporting pieces in them. Now to prove how mentally unstable and logically indecisive I am, I want to share a homophobic thought here.

Homosexuality and other recently accepted sexual orientations emerged with this logic: We have an spectrum of sexual attraction based on gender concordance, which ranges from purely heterosexual to purely homosexual, having different orientation like bisexuality in between.
But what if "homophobia" is a part of this spectrum too? Like, homophobes are so heterosexual in a way they can tolerate no attraction to the same gender?

P.s: then we must think of heterophobes too, which I don't know if is a thing!?