The owners of the board can run it however they like and everyone else can try their best to abide or leave.
But when politics infuses things like the global climate and basic vaccines, it's not a simple rule to follow. I get the goal of trying to eliminate the caustic rhetoric and personal attacks that come with politics. But there's functionally no difference in saying "x politician is terrible and the Saints are terrible, because both are attacks to a tribalist's fundamental sense of self and identity. Triggers the same part of the brain.