What? How did he nearly kill Daryl and Aaron? That was a trap set by the Wolves
You misread. The people he didn't kill nearly killed Daryl and Aaron. If he killed them, the "threat to Alexandria" would've been solved, but you know: TV plotpoints and all that. Gotta have Morgan say "no, I'm not going to kill you" to cause DRAMA instead of solving future problems with obviously crazy people.