I don't think all the blame is with JJ this time.
When I was younger 2 of the things 1 was taught was
1) if in doubt get it out (yes JJ had plenty of time to do this)
2) come to the ball don't let the ball come to you. (Ayew should of done this)
Ayew has to shoulder the blame too, he goes to the ball then tries to let the ball roll past him and turn but allows the player to nip in and intersept the ball. If he just goes and collects the ball the goal don't happen in my opinion