CSM candidates this question
Fighting against toxicity is a strong case, as it comes with the territory of gaming -everywhere-
However. How would you handle a hypothetical stalemate wherein both parties are believe the other to be toxic, but only one party can really be telling the truth.
But then again, truth is based on the perspective of the perceiver.
Present the evidence of the truth. If it still results in an obstinate attitude in the face of the truth, walk away and find something more productive to consider.