If the government responds appropriately to any new attack I doubt any large scale private response would take place.
However if we get nothing more then an earful of this "tolerance" and "religion of peace" crap and see Bush having tea with more muslims to show us all how wonderful they are I suspect we'd see quite a few beturbanned heads rolling through the gutters of America in short order.
You mean like after 9/11 when a couple of Sikhs got murdered in retaliation by idiots who think that everyone who wears a turban is a Muslim?