UR brings in students from other countries, different backgrounds, and a range of cultures, but if they don't all mix it is an entirely different issue. Students will stick to their respective groups, and while the University expends effort on bringing in both minority students and international ones, the in-group tendencies still continue. The experience is also individual; a student may live on a hall with a large mix of diverse cultures or be in the exact same demographic stratosphere as their whole floor. Some also put forth the effort and meet new people, whereas others are complacent to remain in their comfortable circle of friends. On campus, whites are the majority, with a fair number of Asians and other minorities in the mix. People are generally friendly when interacting, and there are not many incidents of hate offenses, but then again, there is not a large amount of inter-mixing.
It cannot be said that UR does not try to make the campus diverse; they certainly make it their project to attract minorities, but once they get here it becomes a different story entirely. Many stick to their own kind, so to speak, but this is not a blanket statement for the entire school. You will see students of different races and cultures hanging out, but you also see a white person from upstate New York everywhere. The meshing aspect could be improved, but the school is not exclusive by any means.