He’s the same guy that Darryl joined up with in the last episode, one of the Hunters most likely. Darryl might be able to fit in with that group but will not agree with their practices whatsoever. The only real clue we have about who took Beth is the cross on the back window of the car - possibly The Saviors?
I wonder if it might be Gabriel from the comics? Or it could be the Hunters who kidnapped Beth.
Who are they?