Dr Juhdi Jasser (a Muslim) has it exactly right. The theme of this event will not be "We stand with America". It will be one of victimization and grievance.
Not only will groups like CAIR show up to speak, how much do you want to wager that others will show up like Hizb-ut-Tahrir? How much you want to bet that firebrands like Abdul Alim Musa will be there? How about Louis Farrakhan and the Nation of Islam?
How many people will step to the mic and claim that Dzhokhar Tsarnaev is an innocent man?
How many will claim that Sami al Arian is an innocent man?
How many will claim that H Rap Brown is an innocent man?
How many will claim that Tarek Mehanna is an innocent man?
How many will shout their support for Hamas and Hizbollah?
How many will shout, "Death to Israel"?
How many will rail against the "Jewish lobby" in America?
How about a counter demonstration?