While I shed no tears for a man who has taken the life from many others, I also know that to resort to killing this pathetic murderer is not the way to resolve the issue.
For every Tiller there is, there will be another to take his place.
While not the best way, it certainly prevents Tiller from murdering any more innocent babies. I would not convict him of second degree murder, but probably would agree to convict on voluntary manslaughter, which appears to be the crime he committed if he is guilty of any crime.