I wrote about this phenomenon a few years ago. Whenever I hear a rabid homophobe, the first thing I think is that that person is gay him/herself!
Sigmund Freud called this phenomenon "Reaction Formation." Reaction formation occurs when one has an internal conflict and seeks to resolve that conflict by vociferously asserting the very opposite of what he/she actually feels.
So, whenever you hear a rabid homophobe, realize that that person may very well likely be gay!