Yeah, but the didn't start attacking the US until we got our military fully involved in defending our oil supplies. Even though they weren't ours.
Biggest user of said supply. It is an interest of the US. Yes, it's an interest of the companies that sell it, which is in turn an interest of the US govt for wealth and control.
That being said, this isn't new stuff here. The US did not have the creation rights to defending it's interests. It's been done by every nation/culture past and present. This is how it goes, someone/people have control over a resource and will defend it until it's no longer needed. The Egyptians did it. The Norse did it, the Chinese did it, the Russians did it, the French did it, Native American Tribes did it, and so on, and so forth. (note: Different resources (water, trade routes, land, buffalo herds, etc, but waging war over resources is not new)
I'm not justifying or defending it, however that has been the way of the world for thousands of years. And guess what, it will remain that way until someone figures out a better way.