everything is a conspiracy huh?
A fence was straddled with Mubarak because of the big picture. Hosni did offer some sense of stability, as twisted as that is, through support for Israel. That was always his calling card, and it was not something that the US could just let go of easily without having some sense of what would follow. If the US rejected Mubarak out of hand and then he found the means to remain in power, it would not have helped anyone. The next alternative would have been to go in and invade.
Obama did not want to get sucked into an invasion and another Iraq. Not a bad move. The same instincts are in play in Libya. If the motive is oil then going in with ground forces and occupying the country would be a pretty good game plan. Obama is putting a very tight reign on militaristic means of change, and ensuring that the responsibility is spread out by all interested parties. If you think Britain hasn't been hit hard by financial crisis you're out of your mind. And it has been Britain and France that want to go after Khaddafi. It's a pretty complicated situation, but one thing is pretty clear - the aim is not to have those complications blow up in our faces in the form of another Iraq. And it is hard to see where that isn't just entirely reasonable and sensible.