"target them"? What are you proposing?
They made their choices. Their victims had none.
Make them explain their kids that they can't play games on Xbox or listen to music on Spotify because their daddy is a terrorist.
So whatabout someother asshole? Come back when you have an argument.
For governments, standard CT/AML financial intelligence: identify employees, shareholders/UBOs and add them and subsequent companies they start to the various watchlists/blacklists. For the public: open source intelligence, post info on forums, name and shame etc.