Oh okay. I see where you are taking it.
I would say that it is okay. I can't speak for gay people, but I think a parent willing to do this because of their child being gay, is not a parent a gay child would want to have.
My world view is consistent, not that of a liberal or conservative. There really isn't a singular principle that you can try to apply for liberal discrimination and abortion doctrine to try and understand it. Trying to do so will make you feel like you exposed a flaw in their logic, but you have to understand that they are not always using the same logic for each situation. Logical consistency is ideological, like anarchy or libertarianism, or totalitarianism. One of our esteemed liberals on this board has or had in his signature the self quote "Ideology is the enemy".