What House Boy is trying to say is that Harvard, being the third-largest law school in the nation, has plenty of diversity. Boston is also diverse. This is really one of those instances in which you don't have much to worry about. Yeah, you hear stories of racism, but really...what city doesn't have those? I'd really like to know.
And if any of you get into Yale, the answer is pretty much the same, except divide H's size by 3. Diversity really shouldn't be a reason to keep you from going to either school, although, of course, that's not going to stop you guys from over-analyzing every little thing. I did the same thing and can't blame you, but it's amusing nonetheless.