What do christians have against gay people

[OnlyNatural]

I would argue that in nature quite regularly the normal behavior of animals is males and females are attracted to each other. I would argue the number of 'heterosexual' animals far outweighs the number of 'homosexual' animals therefore supporting the idea hetrosexuality, the desire to mate with a member of the opposite sex, is normal behavior.

You're right, in that sense heterosexuality is the norm. I meant that it is not unnatural, and not rare. 'Abnormal' can also have a negative connotation, and I don't think there's anything innately negative about homosexuality, even though it is not the norm.

Morality is subjective. My subjective morality, which is no more or less valid than yours, says it is immoral.

I agree that each person's morality is subjective, though the suffering and well-being of humans is undeniably important in moral issues. I would be interested to know why you think homosexuality is immoral.

Anti-life? I don't believe the boy even knew what he meant by that. I just can't equate 'not breeding' with 'anti-life'.

If you're referring to me, I'm not a boy. And I didn't equate anti-life just with not-breeding, though that seems to be part of their (Catholics') concern. I mentioned other examples, which are of course not exhaustive.