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It is you who .... crazy
should i put is or are?
It is me who ... crazy
should i put is or are? or shockingly am?
it is you who are crazy.
It is me who is crazy (informal 
It is I who am crazy. (formal)
Yet, wouldn't an English native rather say: "You are the crazy one!", or "you are crazy!" (with the emphasis on "you")?