They are trying...hell most of Europe is trying...but it’s closing the barn door AFTER the horses have escaped.
Islam has already spread its cancerous tentacles over a large part of the continent here.
To the point that IRRC in England (one of our Brit FReepers help me here) there are Sharia only zones now where if you’re not muslim you can’t enter...to include law enforcement and EMS. Sharia law rules in those neighborhoods.
Canada has Sharia Law courts for muslims and our own President has a Sharia banking advisor.
It’s gonna take more will power than any EU country has right now to stem the tide IMHO.
America SHOULD be taking heed of what’s happening here...but they aren’t.