1. It is impossible to kill enough people to end up with no enemies.The intelligence services call it "Blowback," of course.
2. For every person your military kills, you create 100 more enemies from family, friends, countrymen, religion colleagues, etc.
3. Friends come and go. Enemies accumulate. --via Jomama and with apologies to Intech Concepts 34, DougBuchanan.com </a>
Unless you believe 911 was an inside job.