STAFF FAULTS FALLON FOR BACKING BULLIES

JOVIAL Jimmy Fallon is being blasted as a heartless boss who oversaw a toxic work environment behind the scenes of "The Tonight Show," insiders dish.

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While Jimmy isn't personally being branded a bully, a source insists "at any moment he could have stood up and said 'enough' to the terrible goings-on. But instead, at best he did nothing, and at worst he encouraged it."