Consider this quote by Ohioan:
I fear that too many on our side simply seek a feel good sense of their own moral superiority, to want to actually approach the issue tactically, as opposed to emotionally. (Maybe that is being unkind, but some of them sure do not understand the art of persuading the not already committed.)
The answer to your question of why is - to save lives. We have to do anything we can.
Ahhh, compromise for any excuse, eh? I'm not for screaming in people's faces, however I'm also not for making someone who is about to commit murder on a child feel warm and fuzzy so they can come over to 'our' side one at a time