WASHINGTON – President Obama has a peculiar talent for enraging his critics while deflating the enthusiasm of his friends, and it was on full display in the Manhattan mosque controversy.

His first intervention, at a White House dinner for Ramadan on Friday, was an unqualified defense of both religious liberty and religious tolerance, implying that opposition to a mosque near Ground Zero violated both. In his second intervention, in an unplanned exchange with a reporter on Saturday, he insisted that he was not commenting “on the wisdom” of building the mosque, merely affirming the right to a construction permit. It was not a contradiction, but it was a marked change in tone. Obama managed to collect all the political damage for taking an unpopular stand without gaining credit for political courage.

But being hapless does not make the president wrong.

Though columnists are loath to admit it, there is a difference between being a commentator and being president. Pundits have every right to raise questions about the construction of an Islamic center near Ground Zero. Where is the funding coming from? What are the motives of its supporters? Is the symbolism insensitive?

But the view from the Oval Office differs from the view from a keyboard. A president does not merely have opinions; he has duties to the Constitution and to the citizens he serves – including millions of Muslim citizens. His primary concern is not the sifting of sensitivities but the protection of the American people and the vindication of their rights.

By this standard, Obama had no choice but the general path he took. No president, of any party or ideology, could tell millions of Americans that their sacred building desecrates American holy ground. This would understandably be taken as a presidential assault on the deepest beliefs of his fellow citizens. It would be an unprecedented act of sectarianism, alienating an entire faith tradition from the American experiment. If a church or synagogue can be built on a commercial street in Lower Manhattan, declaring a mosque off-limits would officially equate Islam with violence and terrorism. No president would consider making such a statement. And those commentators who urge the president to do so fundamentally misunderstand the presidency itself.

An inclusive rhetoric toward Islam is sometimes dismissed as mere political correctness. Having spent some time crafting such rhetoric for a president, I can attest that it is actually a matter of national interest. It is appropriate – in my view, required – for a president to draw a clear line between “us” and “them” in the global conflict with Muslim militants. I wish Obama would do it with more vigor. But it matters greatly where that line is drawn. The militants hope, above all else, to provoke conflict between the West and Islam – to graft their totalitarian political manias onto a broader movement of Muslim solidarity. America hopes to draw a line that isolates the politically violent and those who tolerate political violence – creating solidarity with their Muslim opponents and with the victims of radicalism.

How precisely is our cause served by treating the construction of a non-radical mosque in Lower Manhattan as the functional equivalent of desecrating a grave? It assumes a civilizational conflict instead of defusing it. Symbolism is indeed important in the war against terrorism. But a mosque that rejects radicalism is not a symbol of the enemy’s victory; it is a prerequisite for our own.

The federal government has a response to American mosques taken over by advocates of violence. It investigates them, freezes their assets and charges their leaders. It does not urge zoning decisions that express a general discomfort with Islam itself.

Here again, this debate illustrates a gap in perspective. A commentator can speak with obvious sincerity of preventing American hallowed ground from being overshadowed by a mosque. A president not only serves Muslim citizens, not only commands Muslims in the American military, but also leads a coalition that includes Iraqi and Afghan Muslims who risk death each day at our side fighting Islamic radicalism. How could he possibly tell them that their place of worship inherently symbolizes the triumph of terror?

There are many reasons to criticize Obama’s late, vacillating response to the Manhattan mosque, and perhaps even to criticize this particular mosque. But those who want a president to assert that any mosque would defile the neighborhood near Ground Zero are asking him to undermine the war on terrorism. A war on Islam would make a war on terrorism impossible.

© 2010, Washington Post Writers Group