This is one of the stranger critiques I have seen. It's right up there with the claim that, if we had Vietnam-era weapons, tactics and medical treatment, we would have Vietnam-era casualties.
If we had all those Hollywood weapons(love the gun Jesse uses in Predator) we could have sent in ten guys and a cool looking recreational vehicle and been done with this war back in 91.
The truth is, during this war so far, far more civilians than military have been killed at the hands of the enemy.
Civilians ~3000
Military ~1100
The reason we have a military is to prevent our enemies from killing our civilians.