as long as there are humans on this planet, there will be human nature.
As long as there is human nature, there will be territorialism and religion.
This is inevitable in the extreme, utterly unavoidable, and a realistic fact, not a pessimistic rant.
Whilst i agree that with enough vigour you can overturn the ideologies of a madman (which is usually only acheived with brute force and by its very definition an act of war), when religion plays a role in the conflict, youre pretty much screwed.