It's the classic "the enemy of my enemy is my friend" thinking.So fund war for the sake of war? Craziness.
But what happens when both of them are your enemies? You end up having two friends, who are also both your enemies....
Frankly, it's a strategy. Clever? Only if it can be successfully pulled off, and both of them end up wiping each other out. Unfortunately, as history has proven (and Poncho has pointed out), we're not very successful....