So, are they terrorists you say?

Well, then.

Classify them as such.

=> Any funding of them is now funding of terrorism. Including paying tax in Russia. Which means any and all companies doing business in and with Russia, and the individuals working in and for those companies now have to immediately stop, or else face jail... right?

Seems like it could be super effective way of halting Russia?

cf classification of Iranian's Revoutionary Guard as a terrorist org: https://www.euronews.com/my-europe/2023/01/23/eu-faces-growi...