The enemy knows our ROE and uses them, an excerpt:

"...the psychology of fear has set in. Not fear of the enemy, but fear of firing a weapon. This fear can cause hesitation, and even the enemy knows the U.S. ROE and can and has taken advantage of them. Hence, there is increased danger for our troops, and they know it.

What we need are robust rules of engagement. What we have are confused Soldiers and Marines, afraid to fire their weapons." LINK