“...whether radical Islam played a role ...”
Here’s a hint:
When somebody shouts ‘Allahu Akbar’ prior to an attack, the combined behavior IS the very definition of “radical islam”.
As in the case with Nadal Hassan, denying the facts do not change the facts.
“When somebody shouts ‘Allahu Akbar’ prior to an attack,...”
Then he should die instantly in a hail of infidel’s pig-smeared bullets.