discrimination at work ?

[Schneed10]

Managers shouldn't get into the minutia when two employees have a confrontation. It should be made clear that confrontations in the workplace are not tolerated. The manager should seek to find out what happened, and determine if there was one victim and one aggressor, or two parties contributing to the conflict. But as for making judgments as to whether certain verbal statements are acceptable, managers shouldn't make those judgments because they're so subjective. The manager needs to convey the bottom line: if you had a role, ANY role in the confrontation, then that's unacceptable.

It puts the onus on the employees to manage their emotions professionally when in the workplace. It also puts the onus on them to stay away from people who could cause them aggravation, thereby increasing their chances of steering clear of confrontation in the first place.

Long story short, both people involved here need to grow the eff up.