"If homosexualality is an abomination, why does God keep making them? "
It's not proven that that inclination is genetically determined or that 'God made them that way'. The bible teaches that God lets people fall into their own pits, and lets them fall into their own sin when they don't love the truth of God. If they truly loved the truth of God, you'd think they would accept God's view of what good human sexuality is supposed to look like.
Here is a quote from the bible which gives the impression that the bible teaches that people are not born that way, but that it is a result of something else:
Romans 1:21-27 "Because that, when they knew God, they glorified him not as God, neither were thankful; but became vain in their imaginations, and their foolish heart was darkened. Professing themselves to be wise, they became fools, And changed the glory of the uncorruptible God into an image made like to corruptible man, and to birds, and fourfooted beasts, and creeping things. Wherefore God also gave them up to uncleanness through the lusts of their own hearts, to dishonour their own bodies between themselves: Who changed the truth of God into a lie, and worshipped and served the creature more than the Creator, who is blessed for ever. Amen. For this cause God gave them up unto vile affections: for even their women did change the natural use into that which is against nature: And likewise also the men, leaving the natural use of the woman, burned in their lust one toward another; men with men working that which is unseemly, and receiving in themselves that recompence of their error which was meet."
That being said, I don't think gay people are less valuable than others. Nobody is perfect, but it's always good to strive to better ones self.