Scooby, I've seen what your saying, and I understand that it may be strange or uncomfortable (for you, for other students, for the URMs) ... It was a little bit uncomfortable for me, too.
But long run here, dude ... You can interact with these classmates later. You can make black, hispanic, and yes, even white friends later. And get involved in minority lives through the community and through med school programs (AMSA, SNMA, whatever). That's what I do.
I know you aren't talking admissions, or health care disparties in minorities, or any of the major social problems plaguing America. You're speaking about an incident(s) that has made some of us feel uncomfortable, but perhaps eased the situation for other people. It is tough. Non-URMs will never (I'm a non-URM) have the same viewpoint as an URM, and maybe it will be helpful for them to have these 'special' events.
Even though it may seem hypocritical or seem to promote un-diversity ... I am going to give the benefit to the URM students who planned these affairs, because I feel they have the foresight to say that these 'special' events have been/will be helpful to future first year students. If they are deleterious, I think the future M1s might take a different approach next year. Or maybe you can suggest to SNMA next year that perhaps 'others' can help out with the 'special' activities.
Scooby, it seems like you were frustrated with other people shorthcoming; frustrated that other people cannot behave in a way that is natural for someone like you - to be able to interact with anyone regardless of race, creed, faith, or socioeconomic status. It is natural for me, too. And we should be part of solution and contribute ideas to make it a better situation.
But, listen, some of our future colleagues have never had a black friend, never been to a quinsietta, never celebrated Diwali ... and I'm not sure if they are the ones that I want representing my school on Interview Day. That isn't right, either.
So, next year, when you are helping out with tours, student interviews, etc., reach out to the URM interviewees as well as the non-URM interviewees, so none of them feel they way you did this time next year.
Good luck,
Simul