Then it wouldn't be much of an argument would it?
I agree, it is my opinion, but it is not only my opinion. Many people agree with me, maybe it's different in Western culture where you are more open to such matters. However, I come from a conservative region in the world and we still don't accept gay behaviour as normal as you do. To us, their behaviour is wrong. We still believe in "right" and "wrong" wheras, in America, anything seems acceptable. Nothing is right or wrong. You have been raised to accept all kinds of people, this is mainly because of racism issues America has faced in the past. It could explain why most Americans are very passionate towards accepting any kinds of people.
I come from a country where racism was never a problem. Therefore, we still judge people in a relatively insensitive way because we have never had a reason to radically rid of our prejudice mentality unlike America.
Ultimately, when I say I hate gays here in my country, I would receive nods of agreement. While in the states, it wouldn't be quite the same.