Countries in GCC don't follow the same policy when it comes to Iran. While I agree with you about UAE, I am not sure how you can place Kuwait in that same category. Kuwait never advocated nor supported attacks against its neighbors including Iran.
This is a war that was launched at the behest of Israel and its supporters in the USA. The focus should be placed where it is. Wall Street Journal, New York Times, and Washington Post all came up this accusation against Saudi Arabia and other GCC because they want the blame to be shifted from Israel and its stooges in America's deep state since the war is unpopular and its impacts on the world economy could be devastating if the Strait of Hormuz remains closed.