Proud to be black or proud to be white.... Getting iffy depending on context. Of course, the opposite would be troublesome, ashamed to be black, or ashamed to be white.
I hope people feel their heritage is "cool" but I'd rather not have people feel their heritage or a different heritage is "better".
On the other hand, I feel that there are some societies that indeed contributed more to civilization than others. I don't think that's deniable. But I mean as a person one should not feel "better" or "worse" than any other person because of heritage.
As for feeling "better" I agree with you, only that pride is not necessarily a feeling of superiority. In most cases it is an acknowledgement of something related to the individual that he or she feels is inherently good. Not everyone associates good with better.
Also, to echo another commenter here, take the classic quote from Samuel Johnson: "patriotism is the last refuge of a scoundrel"
Also pride is considered to be the worst of the seven deadly sins for good reason. So tempting yet can be so poisonous.