It is simply wrong to ambush and kill another human being. You have a good point. It will be used by those invested in our national killing factories to marginalize pro-life. What this person did was very selfish—he/she may have enjoyed self-gratification for an instant but does not help the cause of life whatsoever.
That’s a sweeping statement. Outside of this particular issue do you oppose snipers?
On the abortion issue I have always taken a competing rights perspective in that the unborn at some point had more right to live than the woman had to control her body. A later term abortion would clearly be infringing upon the rights of a baby that could survive outside the body.
For those passionate about the pro life movement I see this as a setback. The media will seize upon this just like they do when there is a shooting and they go after gun rights.