My philosophy is this: If it's a "fair fight," you've screwed up. The idea is to make it as unfair to the other side as you can.
Yes - kill them! Kill them all!
And, after you have killed them, put your boot "against their neck" and kill them again.
Then nuke them from orbit just to be sure...
ETA:
My idol General Patton said it best:
"The objective is NOT to die for your country but make the other guy die for his country!"