There is no upside for Trump attending the debate in the first place. They have the muzzie activist in there who will paint him as an evil hitler bigot the whole time and megan will be trying to paint him as a woman hater.
He can always defend himself against anyone, but he would be allowing the media to gather some sound bites to use against him.
Just bring in a Koran...and answer the question directly with quotes....
Striking the necks
hiding behind stones
Etc...