I believe that the Scouts also deny that their policy is discrimination, too.
Oh, I don't think the BSA denies that their policy is discrimination. What they deny is that it's illegal or immoral discrimination. The former has been established in the highest court of the land. The latter is a matter of your own beliefs.
The real issue in this argument is whether there is an absolute authority to decide what is immoral and moral. The Scouts claim their authority for determining homosexuality is immoral, and therefore absolutely wrong, comes from God. The PC crowd claims their authority for saying homosexuality is good, (or at the very least value neutral) comes from ....?
Just an aside, the PC crowd has been known for arguing many of their non-traditional values are not "bad" because all things are morally equivalent, and that nothing is really "wrong". If that is the case, how can the Scouts be "wrong" to disagree with the PC position? Oh, I forgot, we're dealing with liberal-think here, and the only evil in the world is not the evil-doer, but one who criticizes the evil-doer.