Great Knolly What ever you say about it, it's not natural to have your arm horizontal as your running. I don't think it was misinterpretation. It was borderline and the ref saw it as a red.
It's pretty common to hold a player off with an arm. To be violent there needs to be a suggestion of intent arounding swing the arm into the face.
To me D'Urso knows there was no violent intent behind it, but would rather hide behind the fact that there was contact and see a player banned than admit he might have been wrong.
If the defender hadn't gone down clutching his face, it would never have been a red. Like the arched-back swan dive in the box, and the rolling around the floor in agony, the "two hands to the face" flop to the ground is a blatantly obvious example of simulation, yet for some reason refs fall for it every single time.
Reading aren't appealing as they know they have no chance of winning. Common sense plays no part in appeals. It's just about mistaken identity or decisions that are 100% certain wrong.