Sometimes. But more often the irrational phobia pertains to an honest, though fairly silly belief that if homosexuals are not actively obstructed from equal legal rights in the USA then somehow our society will shrivel and fall into inexorable decay.
That and a related irrational phobia that if their (the phobes) kids are exposed to the idea that homosexuals are human beings deserving of full equality in legal rights, then the kids will somehow be harmed and/or their lives will be destroyed.
In your opinion...