Are you mssing the point of the 'tolerance' concept here?
Although impossible to find a comparison given the scale of the horror 9/11 - how far are we going to take this inability to move on and build bridges with the majority of Muslims, and take the power away from the extremists.
I would think long and hard about protesting about a new Catholic church being built near me - even though the Christian Brothers's support and cover-up of a child abuser in my wife's school cost her both her career and her health (long story!)
We get nowhere nursing our pains, we must move forward, or else the wrongdoers simply triumph and grow.