It seems your premise is to go about your business and do nothing. Do not go into hiding and tolerate the violence. Accept that this is the new normal.
In 1969 I remember reading 52,000 people were killed on the nation’s highways. About 52,000 troops were killed in Vietnam. Something had to be done.
Eventually seat belts were installed and we pulled out of Vietnam.
Do we need 52,000 Americans killed by Radical Islamic Terrorism before we act?
I don’t think so. Total expulsion of Muslims and complete shutdown of their immigration is too extreme. But doing nothing is not acceptable.