"But we can't even do that to members of the death cult aka islam.
"
Of course we can, and we do. What gave you the idea we weren't watching?
The dems gave me the idea we shouldn't be watching, and if they had any real control over the matter (not that they aren't trying) they would arrest any LEO that was rumored to be doing it.
I suspect our watching is not all that intrusive, and therefore, not as effective as it should be.