Should kids & family movies have gay characters?

Not sure what needs explanation there. You're going to have characters in your movie. I don't see why some of them shouldn't be gay. There's nothing at all wrong with being gay, so why not have gay characters?

What I am saying is that when I think about the sentence "There should be no gay characters in kids and family movies because..." then I can't think of any reasonable and honest way to complete that sentence.

To my mind it's no different from asking whether there should be female characters, or non-white characters, or tall characters, or short characters, or brave characters, or characters with curly hair, or disabled characters, or... well, any other kind of character.

Does that explain it to you?