It's still better than our mediocre, and a heck of a lot better than our worst. One of many things that means is, next time you find yourself impulsively judging somebody by a racial, ethnic, or any other stereotype, stop and think about it. Try to imagine what it would feel like to have people assume that because your skin is pale, you are necessarily rude, arrogant, inconsiderate, and unworthy. Don't do the same thing to someone else. Skin or hair color is no better indication of a person's innate worth than sex is.
Cultural differences do exist and can cause difficulties in understanding.
It helps to remember that different is not necessary bad, it's just different. Not everyone has to believe the same thing or do things in the same way. There's room for rock n' roll, rap, classical, and a lot of other kinds of music in this world, and we're richer for the variety. Nobody has to like everything. But it is arrogant to imagine that if you don't choose it, no one should.