If those who “live by the sword, die by the sword” as Jesus said, then it seems to me that someone must pick up the sword to cause this to happen.
This was something I put forth in the discussions I got into regarding the Iraq war. I felt that the coalition forces were appointed to take care of Saddam Hussein. He lived by the sword, and someone had to carry out his dying by the sword.
That is true. Not to quibble, but Saddam was executed after a trial. Tiller was executed by a man who decided to take the law into his own hands.
Karmically, the result was still the same, though. Neither of them can hurt anybody anymore.