Some people like to rush to judgement and condemn other people for rushing to judgement. It's a form of virtue signaling.
Bob says someone was brandishing a large machete and threatening people. When questioned, that person says he never had a machete and didn't threaten people. Okay then, that clears it up. The only conceivable possibility is that Bob is paranoid and rushed to judgement. Bob apparently cannot tell a guitar from a machete and obviously misread the situation. Case closed.