Take the bible out of the equation. This is not entirely a religious matter.
IMO, you cannot sit in judgement on either one of these men.
One man believes that because the law says killing a growing fetus in the late stages of development is okay, he is justified. Is he? Lots of laws in the past were wrong and against the moral fabric ingrained in humanity. But because of the cultural times, laws got passed and stayed there for decades until our culture realized how wrong and cruel they were. Abortion is one of those laws, IMHO, and one day we will recognize it. Until then....well...there will be people that take it to the absolute repugnant extreme and perform these horrid procedures, and certain kinds of men and women that continue to think for one reason or another that it's perfectly justifiable.
Then, the other man is so repulsed by the brutality and inhumanity of it, that he says, "the law be damned. Who is going to stand up for the right of these lives to go forward? The life growing inside the womb surely can't stand up and speak out for him/herself". So in his mind, he targeted someone he feels killed 60,000+ innocent lives and killed him so he couldn't kill anymore. In the interim, he sacrifices his own life and liberty.
Both men are "wrong" and both men are "right". Both are extreme actions and on far ends of the moral/ethical spectrum. The debate is deeply complicated.