Confront. It doesn't matter if it offended me or not, if it is offensive that must be stated. Always speak the truth, a lie of omission is still a lie.
I do tend to tilt (at windmills!?) for others who are reluctant to speak up. Usually fear is involved and I cannot say that I have no fear as much as I have nothing to loose. It is a good place to be. Stubborn old Yankee if nothing else.