Your question really got me thinking. So permit me to add something to Step 1 of my post #18.
A public information campaign would also be needed. Make it clear that a “religion” that preaches death to the infidels, death to anyone who draws a picture of Mohammed, etc. - that’s a religion deserving of close scrutiny.
Such a campaign would have to be handled delicately, and with great care. It would also be necessary.
"... deserves close scrutiny" my ass. Deserves to be designated a terrorist organization and with and its proponents (Muslims) OUTLAWED!