There are a couple of important issues here; first, what makes people think peace and togetherness would be preached here? Because this Imam said so? Look at what Clifford May wrote:

It’s hardly a secret that some mosques in America, Europe, and the Middle East are centers of extremism. As former federal prosecutor Andrew McCarthy has chronicled, the Dar al-Hijrah Islamic Center and mosque in Falls Church, Va., a suburb of Washington, D.C., has provided a pulpit for several radical imams, including Anwar al-Awlaki, the al-Qaeda terrorist now hiding out in Yemen. Among those Awlaki is said to have inspired: Farouk Abdulmutallab, who tried to blow up a plane on Christmas, Fort Hood massacre suspect Nidal Hasan, and at least two of the 9/11 hijackers.

Terrorists who would go on to take part in the 9/11 attacks also made their base at the King Fahd Mosque in Los Angeles. As Nina Shea has noted, “the mosque’s imam, Fahad al Thumairy, a former Saudi diplomat, was finally expelled by the U.S. in 2003 for suspected terror connections.”

The Al Farouq mosque in Brooklyn is where Omar Abdel Rahman, the Blind Sheikh, delivered sermons. Andy McCarthy eventually sent him to prison in connection with the 1993 World Trade Center bombing.

And just this week, as my colleague Ben Weinthal reported, German authorities banned the Masjid Taiba mosque of Hamburg. It had been a launching pad for the 9/11 terror attacks and “had long served as a hotbed for training jihadists and stoking anti-Western ideology.”

These are just a few, maybe not representative examples, but look at the imam involved:

In his Newsweek column, Zakaria asserts that Rauf “is a moderate Muslim clergyman. He has said one or two things about American foreign policy that strike me as overly critical — but it’s stuff you could read on The Huffington Post any day.”
Among Rauf’s Huffingtonian statements: that American policy was “an accessory to the crime” of 9/11, and that Osama bin Laden was “made in America.”

Rauf will not say whether he views Hamas — which intentionally slaughters civilians, has been designated as a terrorist organization by the U.S. government, and advocates the extermination of both Israelis and Jews — as a terrorist organization.

He explains his reticence by saying that “the issue of terrorism is a very complex question.” No, actually, it’s quite simple: Whatever your grievances, you do not express them by murdering other people’s children. Not accepting that proposition does not make you a terrorist. But it disqualifies you as an anti-terrorist and identifies you as an anti-anti-terrorist.