First of all, thanks for the genuine reply.
I agree, working from within is a valid way to respond. Walking out on hearing the other side is not.
I also agree that using another's pain as a comparison point is a poor choice, which I (personally) would never do. That being said, I am unapologetically Pro-Life.
Maybe it's because my Grandma was told that her future son was not likely to live. There were several complications. She ignored the advice, and My father was born at just over five months. My Grandma was admittedly a party girl (not common in the early forties), drinking, smoking and a lounge singer, and also under a bit of stress from WWII. My father was likely to be premature (under six months), and he was. Upon birth, they told her that he (my father) would be dead in the morning.
She put him in a shoebox on the side of the woodstove, then slept a few hours, and he was still alive, so she fed him...and again in a few hours. Four days later and he was thriving. Years later, two tours in Vietnam, 5 bronze stars (2 with V device), 4 air medals, 1 Purple Heart, 1 MSM, 1 South Vietnamese equivalent of Vietnamese Silver Star. He also rose through the ranks. He enlisted rather than be drafted, and rose to E-5,. At that time he went to OCS, and then flight school. He was eventually a Cobra pilot in Vietnam, then got out, returned as a warrant , then regained commission and then retired an O-4. Agent Orange ultimately killed him. He lived till the end without bitterness.
Instead of telling people that killing is bad (a literal no-brainer), perhaps Catholics should talk about what people can do? Guilt doesn't change people so much as inspiration.