They have no ground to stand on there is no Islamic governance in the world right now even if it appears so or say it in the constitution or be hardliners like taliban etc. The Taliban example they do internal spying (to keep the peace lol while torturing hizb tahrir peaceful members who are weak pacifists) so that alone nullifies it. And the others have usurious banking legalized not riba being done by someone as a sin but legalization of it. And many other things.