My son is 1/4 Indonesian by ancestry (his paternal great-grandparents fled Indonesian for political reasons). He self-identifies as Caucasian because that’s how he was raised and how he thinks of himself, but those looking at him, especially those wishing to discriminate can definitely identify that he has a mixed ancestry. Many times in his life he has gotten the question ‘what are you?’ from people trying to determine his ethnic heritage who didn’t put much thought into their phrasing. The response he has learned to go with is ‘I’m an American, the same as you.’ 
Although he doesn’t have any experience with the Greek system because it was not something he was interested in getting involved with, I can’t think of a single instance in which he has felt any discrimination in his time at UA (this is now his 4th year on campus).
There are 30,000 students at UA and yes, there will be some that are closed-minded, but that’s not the norm. In a group of 30,000 anyone who makes an effort will be able to find others who are like minded, share interests, and are accepting of whatever differences the others may have.
I live in Indiana which is a very conservative and not very diverse state and what is true here is that the more rural areas have more closed minded people primarily because they have not been exposed to many different cultures. However, Indiana University (where I attended) is viewed as very liberal and the university attracts people from many different cultural backgrounds. I assume the same is true of Alabama and that if you travel far from campus into the more rural regions of the state you will encounter more people that simply haven’t been exposed to racial diversity in their lifetimes. However that is not true of the university which draws people from many different areas and backgrounds.
And by the way my son is extremely liberal and a very proud atheist, who in his time at Bama has had 1 Jewish roommate and 2 different homosexual roommates and although I don’t know of all of their experiences have not heard from my son that any of them experienced any strong discrimination or felt out of place.