They are being manipulated by the same kind of people that give us the “Patriot Front” and the “Proud Boys” and so on in this country.
In other words the law enforcement-intelligence apparatus of the United States.
Overseas the CIA-MI 6 folks did Libya and Syria where they got “Assad’s muslim subjects’ to do what you speak of in regards to Putin.
The old 2011 MO of the US-UK created Syrian Civil War.
Or, as is much more usual in history, people do things just because. There are patterns of behavior typical of given societies, and Muslims are much given to the “mad mullah” phenomenon. It goes way, way back, and there was no Arab bureau, MI5 or CIA then.
The track record of western intelligence agencies is not that they initiate whatever. They see some new thing and try to “help”.