I have no doubt that Americans do not like being at war, but the radical Islamists don't give a damn what we like. They are conducting a war against us, and they are not going to stop, just because we are tired of war.
If we do not confront them in their backyard, with armed troops, we will be confronting them, on their terms, in our backyard, with innocent children and a few police officers.
It is virtually impossible to protect a free society from committed terrorists. They can move around at will, and strike as they see fit. All we can do is react after the fact, while we continue to bury the bodies.