I abhor the use of the term “homophobic”, when what is meant is “homoantagonistic”. I know few, if any, straight men who “fear” homosexuals, even if they were being “hit on”... the reaction could range from a response of “Nah, man... I’m straight.” to something more aggressive. The more secure a person is in his own sexuality, the less likely he is apt to present hostility toward something in not in keeping with that self-concept.
Homoantagonists tend to be very insecure in their own heterosexuality, and feel the need to “prove” it by making insults, when in reality, all that is done by that hostility, is proof of their own insecurity.
This is especially true of people (particularly men) involved in activities which have, stereotypically, been largely populated by the gay community, e.g. musical theatre, interior decorators, and bodybuilders.