I can't lie about this section. I have some issues with Tulane's student body.
I was the president of the Multicultural club in my high school, so I obviously embrace other cultures and personal ideologies.
Tulane is almost entirely white people. Many of them are wealthy, or at least they aren't hurting for money.
There are some black students, most of whom only associate with each other. There is an Eastern Asian population, but they too stick together. We have a small Indian group of students, and - you guessed it - they only hang out with each other. I have a Turkish friend who is a Freshman, and he and two other girls are the only Turkish people at Tulane. There is diversity, but whether or not that diversity exceeds paper and statistics is another question.
There are lots of multicultural things to do around campus, but turnout is low (not any lower than other events, though).
There doesn't seem to be any overt racism or anything, but you can tell that there are differences. Different races tend to hang out together and people from certain socio-economic backgrounds hang out together. Of course, these cliques may be a result of the different organizations people become affiliated with, as well. Fraternities and Sororities tend to have wealthier students, and the various cultural groups will of course attract that culture or race.
Personally, I am active in many different groups and I do not hold myself to any sort of "clique" or group. I have some very good friends in Theater, and I always perform in the Indian Association's dance events. I attend Green Club meetings and the Vietnamese Association functions. There is no reason that anyone should feel isolated from other groups, and I don't isolate myself from them. I don't judge, and neither does anyone else. It is just personal preference, and most of the students at Tulane tend to prefer to socialize with specific groups. I don't find this much different to my high school, to tell you the truth.
I don't want to paint too terrible a picture, of course. This is not the only way things work. You will undoubtedly become close with your dormmates, whoever they are. I dated an Egyptian and one of my best friends is half Vietnamese and half Chinese. There aren't any social restrictions, and no one will look down on you if you associate with people who are - dare I say - unlike you.
Otherwise, Tulane students are pretty relaxed. It is more liberal than conservative, though the conservative students do have their organizations, as well. There is a place for everyone at Tulane, that is for sure.