This is an entirely legit question, one of prejudice vs. coping skills. I've seen people laugh when called a fag, and I've seen the word make people cry not just because of the word, but the DAILY ridicule that the word is a reminder of. Imagine being a bald cancer patient and somebody yells "Hey baldy!" Some people can handle the baggage that comes with being gay.
If homosexuality were taught in schools (as it should be), NOT implied to be abnormal (since many animals have same-sex relationships) then this wouldn't be an issue. It it were never frowned upon any more than wearing mismatched socks, people wouldn't feel conflicted about it. It homosexuality were never the cause of ridicule and violence, fewer would be ashamed of if.
I've always been comfortable with who I am so this isn't an issue for me, but imagine a a gay 16 year old who's friends constantly call problems gay "My car won't start this is SO gay", "Look at how he walks he's SO gay." Imagine a 45 year old who's parent are pressuring him into marriage with a woman and a traditional family cuz the biological clock is ticking and the neighbors are talking. Or having to live everyday of your life knowing that the religion your parents drilled into your brain insists that your desires will lead to your damnnation.
Imagine a feminine adolescent (who's already outcast at school) feeling lonely and considering going to a gay club, then hearing a news story about a homosexual being tortured, tied to the back of a drug, and left to be picked apart by animals SPECIFICALLY because he was gay. Imagine having a secret that, when told, will probably alienate you from those closest to you.
I don't fault humans for being weak, I pray for them.
Me personally, I'd hate being straight. I could write a book about the sexual frustrations of my straight friends, gay sex is a click away!