There are approximately 2,000,000,000 moozlums in the world. Assume that 1/100th of a percent of moozlums want to murder you and your family. That is 200,000 potential murderers. Good luck figuring out which moozlums are in that 1/100th of a percent.
They’ve got 90%+ tallgrass to hide in.
PS: it’s probably multiples more than 1%.