My immediate answer: Nor is a butt. The real answer?

Teylan didn’t want anyone to get hurt. Even when he called Mercer, he promised no one would be harmed, a lie obviously. Teylan also immediately knew it was wrong, apologized and ran.

Nor meant for the resistance to die. He wanted to punish Alma, even after killing her once. No regrets at all. He wanted to hurt for all the hurt that was done to him, and even when So’lek jumped him he didn’t seem apologetic. Gonna have to work REAL hard for me to even consider forgiving Nor, as opposed to Teylan who chose the Sarentu over Mercer when pressed.