I'm a member of an honors program and have served on one of the admissions committees, and I can say (at least for our program), the race of an applicant has never come up. We discuss grades, test scores, ECs, essays, LORs... thats about it. Now, we don't recruit a huge amount of minorities, but thats mostly because not many apply, and many turn the scholarship down to go to a different school (Maybe they got scholarships at other schools. We don't ask why a student turns us down). We have many Hispanics, and I can think of a handful of African American honors scholars.
Now, you suspect you have been barred from various programs because of your race. Is there anything to actually substantiate these claims? They may have not liked your application for some other reason. I have a very good friend who applied for the program which I'm in. She had amazing grades, good test scores, and relatively good ECs (not much community service I'd say). She got assigned to a different admissions committee than the one I'm on (conflict of interests are avoided), and got rejected. Whether it was low community service hours or bad essays or a poor LOR, who knows. Now, I know for a fact she had even better better stats than some of the people that got in, because I selected them. But shes not accusing the admissions committee of being anti-semitic (She happens to be Jewish), and if she was, I would treat the claim as ridiculous. Do you have anything other than your rejection to substantiate your claim that you were denied opportunities specifically because of your race?
Conversely, theres also plenty of other honors programs I am *definitely* not eligible for because of my race. Theres honors programs for a *wide* variety of ethnicities at my school, except for Caucasians. There are many minority outreach programs that provide opportunities and scholarships that are not available to me.
Now as for study groups, that may be your classmates. I know when I chose who to study with I usually just pick a classmate I'm on good terms with who seems to be relatively on top of the material, without reference to his/her race. Since Fresno State is an extraordinarily diverse institution, thats been a wide variety of people over the years. Can't say my experiences over the past 3 years have been any better OR worse because of this diversity in any way shape or form.