Speaking as someone who has never attempted to pidgeon-hole the left and Obama over Libya, I must say the comparison of a small-scale conflict to Iraq-Afghanistan is silly. Libya isn't even being waged as part of the WOT (unless you include regional stability, which is a defacto rather than deliberate part of any such scenareo). I pretty much have been anything from moderate to supportive of Obama on this particular area. While I try to discourage American involvement in these situations, I'm not going to get terribly upset, either. Especially considering the way we have been using our military these days.
I guess, with this in mind, I'm not really the target audience for the OP, but it is a silly defense to use. On a general political front, Obama will constantly remain under pressure from people on the far left to end all military engagements and to pull out of Iraq/Afghanistan/Libya/Pakistan, which will continue to result in those from the right criticizing him over drone and special ops incursions into Pakistan, as well as the whole Libya affair.