Corrected entry: At various points Homer says things which imply that he has very little problem with anybody being gay (e.g., his misunderstanding with Mr. Burns in "Last Exit to Springfield") but in this episode we are told he is homophobic.
Corrected entry: John is wearing Homer's old bowling shirt which he got at the Goodwill, but at the end of the bowling episode, Mr. Burn's attack hounds tears Homer's "Pin Pals" shirt to shreds. How could John get that shirt at the Goodwill if the hounds tore it up?
Correction: It isn't as simple as that. Homer has no real problem with casual acquaintances being gay. He DOES have a problem with a flamboyantly homosexual man being close to his family and is worried about the effect it will have on Bart.