It's more about being black and white; Chris knows that offence provokes anger. Remember people calling him Buffalo Bill.I guess he can empathize, since he has experience with being enraged at retail stores over product designs.
Also, it's just a dumb sweater.
I don't think Chris could understand that although OCD is a serious condition, there's nothing really offensive about this dumb sweater.
I have seen shirts with OCD: Obsessive Chihuahua Disorder. Like I said, it's not to be taken lightly, but I doubt this woman even has OCD.