While I'm certain that Russia and China would like to see the wind taken from America's sails, I'm not so sure they'd like or could tolerate the full-bore Caliphate as desired by the Islamists (esp. Russia with trouble already on its borders and knowing the Caliphate is eventually to include Europe). Any collapse of America's economy (the Islamist's goal) is certain to have the same effect on China, with massive social disruption.
Do they want that? I don't think so.
Europe is either ignorant or simply doesn't care that the Caliphate is envisioned to include Rome and Constantinople.