Yeah.
It takes a lot of courage to attack and murder unarmed flight attendants.
He said they didn't lack physical courage. Nobody who willingly and knowingly sacrifices their life for a cause lacks physical courage.
You can say that they lack morals, intelligence or souls, but those black-hearted men did have physical courage. And don't underestimate them - they are our enemy, and we need to be honest about our enemy if we're going to defeat them. Trying to pump ourselves up with false rhetoric doesn't help.