Sadly.
It WILL take another attack,
and the reaction to that attack will set the stage only for chaos or enslavement.
If we jump back and concede to the islamists, they win. If we react by rounding them up for deportation the islamists have their 'proof' that we are at war with their so called relegion. If, as a public & not as a state, there followed a string of lynchings; the socialists and one worlders within the US win and the islamists get what they wanted anyway.
We, the conservatives or almost conservatives in American politics, are in the usual mode of waiting for something to react to.