As you've all said, it's not going to end well. However, you have to appreciate that at least this century the US has been overthrowing dictators, as opposed to the Cold War policy of supporting dictators such as Pinochet.
A bit off topic there, but with this whole thing my main hope is that Britain doesn't get involved. It looks like we probably will, along with France, now the US has decided to send arms. Even though everybody knows they're probably just going to be used by terrorists / future dictators once the war is over. If it ever is. I'm just hoping Nick Clegg would destroy the coalition rather than assist the rebels.