The Brotherhood’s fall will have profound implications for the future of political Islam, reverberating across the region in potentially dangerous ways. One of the most important political developments of recent years was the decision of Islamist parties to make peace with democracy and commit to playing by the rules of the political game. Leaders counseled patience to their followers. Their time would come, they were told.

Now supporters of the Brotherhood will ask, with good reason, whether democracy still has anything to offer them. Mr. Morsi’s removal will breathe new life into the ideological claims of radicals. Al Qaeda and its followers have long argued that change can’t come through the democracy of “unbelievers”; violence is the only path. As the Qaeda leader Ayman al-Zawahri once said, “What is truly regrettable is the rallying of thousands of duped Muslim youth in voter queues before ballot boxes instead of lining them up to fight in the cause of Allah.”…

In hundreds of interviews that I’ve conducted with Muslim Brotherhood leaders and activists in Egypt and Jordan over the past decade, many have brought up Algeria and the so-called American veto — the notion that the United States and other Western powers would simply not allow Islamists to assume power through democratic elections.

The subversion of democracy in 1992 in Algeria wasn’t widely reported in the West, nor was it seen as particularly important. This time, in Egypt, it happened while the whole world was watching.