Social Rejection Hurts

The gays may argue that racist people hurt other peoples feelings in social and emotional ways, not necessarily by discriminating. But that simply being gay doesn't hurt others.

This is not true. An individual racist disliking someone based on race causes hurt feelings in the same way an individual gay person rejecting someone of the opposite gender hurts the other person.

The reality is that on an individual level social or emotional rejection hurts. And in particular, racial or romantic rejection hurts more than most other types of rejection that are based on any sort of personal preferences.

But then there is the hurt that can be inflicted on others by collective racism. However, this collective racism has the same potential to hurt people as collective action by gay people, or any other collective group of people can inflict.