To be fair, it seems Obama had no problem with Qadafi, until the Arab Spring arrived.
Faced with doing nothing while Qadafi slaughtered people, Obama took action.
(And faced with Syria slaughtering people with a different set of challenges to doing something, we've done very little but condemn it.)
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Unlike cybridiot, I have a different take here, as Obama watched Libya descend into civil war.
Maybe point granted, Gaddafi was doing exactly what Assad in Syria is now doing. But unlike Egypt and Tunisia, Gaddafi lost the leadership of large parts of his own army who turned on Gaddafi and it was soon apparent that Libya was facing a long and bloody civil war. Maybe Mubarak in Egypt would have done the same, but when all his own army refused to butcher their own people. We saw Mubarak fall instead.
But still Libya had far more oil than Syria, and when the bulk of the Libyan oil went to Italian and French markets, it was not a US problem, even if Italy and France would be hurting as long as the Libyan civil war remained a stalemate. But the world changed when the Arab League decided and almost unanimously voted that Gaddafi had to go, Then and only then was it in US interests to join in as a Junior partner in a coalition to shorten the Libyan civil war. And today, very few miss a brute like Gaddafi as it become USA win win win situation for Libya, the EU, and the Arab world.
Sadly the win win win moment has not yet arrived in Syria. The Arab league is getting closer and closer to voting to say Assad has to go. But the EU has no economic interests in Syria or does the US, and while Turkey may be willing to help the US get rid of Assad, it exposes all kinds of other tensions in the mid-east. So I think its wise for Obama to wait, and maybe hope the Syrian military will remove an ahole like Assad.
When and if the Arab League and the UN comes down hard on Assad, then and only then should the USA look at Syrian other options in MHO.