We just have to kill them at a faster rate than they can be replaced.
This is nonsense. The problem is Islam, and the threat is here. There is only one realistic solution: Ban Islam in the west closing all mosques, deport all Muslims (yes, even citizens), and institute a pet-the-pig requirement to board a plane or enter a non-Muslim country. Bring our troops home and put them on our borders. Nothing the US does in Muslim countries is going to make a damn bit of difference. The threat is Islam here. Let them kill each other in their own crappy countries.
Now I realize this is not going to happen, but neither is there any sense in sending our good people to die for nothing. Islam is the problem, and there is no point in continuing to fight in Muslim countries unless they plan wipe Islam off the face of the earth. These perpetual conflicts accomplish nothing but get our guys killed or maimed and waste billions of dollars.
Killing them faster than they can be replaced, may require killing ten’s of millions.
I forget who said “If you are not willing to kill your enemies, and all who stand with them, then you may as well surrender, for you have already lost”, but it’s true.