It affects you because it is human. If you undermine what humanity is, laws made by humans have no basis at all, and the reason for our entire government collapses.
Cheney's kid: Alive.
Aborted kid: Dead.
This really isn't complicated. You shouldn't have to ask.
And just because the media chooses to make a circus out of poor Mary Cheney doesn't mean it's 'public' behavior any more then it would be if the media started reporting on the sexual habits of the VP.
You really should read what you write before hitting the send button.