Why should we accept Homosexuality?

     Well, I guess many of you have heard of gay right activists giving arguments to justify homosexuality. I have also seen many of such attempts. After some reading, I have found that so far, almost all of the ones I have seen are variations of the following three arguments.

Argument 1

     Homosexuality is inborn, so it is justifiable.

-Hm, I can think of a hxll lot of problems with this argument.
a) I have done some reading. Although quite a lot of twin studies and so on have shown that genes can influence sexual orientation, homosexuality is NOT completely genetic in origin. This means that the first premise is not correct.
b) This argument has a hidden premise: things that are inborn are justifiable. Anyone who has read some psychology will know that many other behaviors such as serial murder and violence are also to a certain extent, genetic in origin. Does this means that these behaviors are also justifiable? I guess not.

Argument 2

     Homosexuality can't be changed, so it must be accepted.

-This argument is pretty similar to the last one. And the problems with it are also quite similar to those with the first argument.
a) NARTH (link: http://narth.com/) has reported that they has acheived some success about changing sexual orientation.I won't go into details here, but if you are interested, you could go to their website.
b) Being unchangeable doesn't make a behavior justifiable. Say, humans' tendency to reject those who are different is also large unchangeable. Following this logic, we shouldn't get rid of discrimination.

Argument 3

     Homosexuality exists in animals, so it is natural.

-Since when did animals became standards of morality? Things that are 'natural' aren't neccessarily good. If this is true, why not we go live in caves or eat raw meats?

Conclusion

     It is very hard to find gay activists that can give appropiate justifications for their behaviors. To a certain extent, I would say that gay activists, like feminists, are promoting illogical thinking. Well, this doesn't neccessarily means that we need to get rid of them, but I think they need to change their argumentative style a bit, don't they?