The so-called push-off by DJ - look at it again; yes, he stuck out his hand, but it made no impact on the defender, who was NOT pushed back or off the play, and who - himself - a nanosecond beford - had HIS hand on DJ. it should have been a non-call; it was ticky-tack.
It did too make an impact. The defender was leaning forward and had his momentum going forward, he could have made a play except he was pushed backwards, reversing his momentum. If you push someone away from the path of the ball you'll be called for interference always, and that's the right call always.