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Yoko syndrome refers to scapegoating of the latest party to become involved with an object of popularity that is now in decline. Refers to the situation of many fans of the beatles blaming Yoko Ono, wife of John Lennon for their break-up, and the end of beatlemania.
See also I like helter skelter
see above for example.
Used to describe the situation when the shit hits the fan and the first person to show up is used as a scapegoat for the problems. Based on the situation- the beatles breaking up. Yoko Ono was blamed by many fans of being the cause. The truth is that she just happened to be there at the time.
guy: Rolls-Royce has gone to shit since the Germans took it over
talking donkey: Their sales were already lower than Bentley. They have become passe. They would still be in the shit if they were still British-owned. You just have a slight case of yoko syndrome.