What's particularly disappointing is that Obama was elected after promising to end US military operations in the Middle East, and did much the opposite. Bush could at least be said to be doing what was expected of him, in continuing the legacy of his father.
Voters should really be holding their leaders to account the fiscal and moral costs of these wars, especially given their strategic objectives haven't been met. OTOH, one could argue it's kept a lot of people employed, and those people vote too.