Because right now we would need around 24 trillion dollars just to say we were flat broke, we are in the middle of a color revolution, we have riots in the streets, we have several areas of the country that are completely outside rule of law and the political structure supports the street terrorists, AND play with a turd, get crap on your fingers.
Everywhere we form an alliance and jump into the local action, we soon get a mess of immigration from there. Think of Vietnam, Central America, Iraq, Afghanistan, Somalia, Ukraine, etc. I would rather not get treated to a wave of Algerians coming to America. The Vietnamese immigrants are the only ones who turned out to be worth a damn.
I get all that. But we got guns and drilling equipment, and they want them and have cash to pay. We hate terrorists, they hate terrorists. They want a superpower ally, and we are a superpower looking for allies to do our bidding. So what is not to like, assuming that they pay on time, do what we require, and behave themselves?