Be angry. Accept it. But don't pretend that your motives are more pure and compassionate than others'.
"Holier than thou" is exactly what leads to stuff like this. There's only a tiny step from thinking you're better than the local thug who is badmouthing Muslims and thinking you're better than the passengers on the plane you are about to use as a large bomb.
The only response to something like this is to try to get it to stop. But trying to get it to stop is also what leads to more things like this.