If someone walks into a room and others heckle them, the heckling victim has a right to react (sometimes by leaving, sometimes by calling police, sometimes by changing to better fit the social norm in that room). Those choices don't indicate anything about what type of offensiveness the hecklers or the heckle victim have committed.

Those choices only indicate who has power and what various groups of humans are willing to encourage or punish. There's nothing objective involved.

Flip it around. An unpopular person walks into a room, gets heckled, and apologizes and leaves. Was the unpopular person objectively offensive in injecting themselves where they weren't wanted? I say no.