The primary job of a football commentator is to guide the audience on what's happening on the pitch from the start of the game to the end. Not to have a grudge against a team and releasing that frustration to the entire audience.
Opinion is amazing & makes sport great. And the sport > experts, callers, writers etc.
I prefer running away from a fight than getting into one (mostly cause I'm sure I'll get knocked out).
But I will protect my experts with everything I have if they're unfairly targeted.