Labels such as "freedom" and "enemy" are relative. Attributes such as "cowardice" and "courage" are likewise relative. If soldiers from "our side", fighting for "our cause", sacrificed themselves on suicide missions that inflicted serious harm to the "enemy", all in the name of our "freedom", we'd call them courageous. The "enemy" would call them cowards.

Were the 9/11 attackers cowards? Were they brave patriots? Such labels, formed in the biased eye of the observer, are meaningless.