“REPENT!! or spend a lot of time with Tiller in eternity.”
Disagree. Killing in defense of human life isn’t a sin. Some guy pulls a gun in a mall and starts blasting away, and I pull mine and blow him out of his socks.
Am I going to hell?
Depends of whether you've repented and accepted Christ with your heart. And that's the same whether you smoke the dude in the mall or not.
Am I going to hell?
You must think there is a difference in your eternal security between shooting a psychopath on a rampage or shooting an abortion doctor on the street, otherwise you would have pulled the trigger on Tiller yourself long ago.