We’re a Country of laws. The analogies with reference to RHINOs and OBL are irrelevant.
Killing a fetus in the womb is legal. Murdering the authorized killer of the fetus is not legal. That’s the bottom line.
It’s likely that political agenda in favor of abortion will gain from this incident. That won’t help the unborn.
Based on your reasoning, those who ran the Nazi death camps and were prosecuted, convicted and executed were innocent because they were following the law.
While what the killer did was wrong, I'll lose no sleep over the death of Tiller.