Look, you're proving to be a rather dense subject to engage in a discussion - I have already laid out the reason behind our intervention in Kosovo previously. It's the same reason we police inner city neighborhoods that don't provide any tax revenue - if we don't the blight will spread.
I'm sorry you're siding with the thugs on this one rather than the cops, but ultimately that's your problem, not mine.
Lastly, back to the oil rationale, it's been used to try to delegitimize our involvement from Vietnam to Kosovo to Afghanistan and pretty much everywhere in between at some point. Hell, I could even propose it as the rationale behind the Serbian take over of Eastern Croatia, what with Arkan using the Oilfields in Eastern Slavonia to fuel part of his black market empire during his brief stay there and all, but you know, I won't, because I know better.
And in your case, you should too.