What men are afraid of is being gay. Sexuality research suggests that sexual preference is a spectrum, not a binary. So it’s common to have same sex attractions. Our culture will instill that being gay is the worst, before you even know what gay is. It’s also shockingly common for boys to be sexually victimized.
Many men question their sexuality. Now add in the nonsense of reactionary gender rolls with strict and rigid religious dogma and it’s no wonder. Being anti-gay is loudly signaling no-homo to the world.
This also explains why closeted gay reactionaries are the most zealous inquisitors. From their puzzle-piece perspective, indulging in gay sex is like openly committing a felony and getting away with it. Of course they hate the openly queer.
There must be a joke somewhere about Hetero erectus.