Still, I would argue that the United States has made the right choice; that this new policy of engagement with even extreme currents of political Islam in the Middle East is salutary; that the model should be extended; and that indeed the Obama administration had little choice. To keep doing the same thing when it does not work is one definition of madness.

What is the alternative to supporting Morsi and the Brotherhood and urging them to be inclusive in the new Egypt? Well, the United States could cut them off and hope they fail — but I can think of no surer way to guarantee radicalization and aggravate the very tendencies the West wants to avoid as a poverty-stricken Egypt goes into an economic tailspin. The same would be true of any attempt to install the armed forces again, with the difference that there would also be bloodshed.

The United States tried Middle Eastern repression in the name of stability for decades: What it got was terrorism-breeding societies of frustrated Arabs under tyrants. (Mohammed Atta came from Cairo.) The Brotherhood narrowly won a free and fair election. If they fail, throw them out next time. That’s democracy.