The United States should declare a State of War - enemy to be appointed later.
All Islamic countries should be told to sign on one side or the other - NO NEUTRALS. Any that don't sign with us within 5 days automatically become free fire zones, to be dealt with by any means we see fit, including nuclear weapons.
There is no way the United States can protect itself from enemies of this kind. Only the countries of origin stand a chance of doing that. Without their cooperation the only choice we have is to eliminate the enemies by any means available. The alternative is to have events like this on a weekly basis.
The enemy has defined itself as a culture, and has declared war on us. Eliminating that culture is the only choice we have. Yes, many innocents will be killed - better theirs than ours.