Ironically, I attended a lecture on the genetic roots of racism. To save you time, I will tell you that there's no such thing as difference between white and black people, or white and asian. We are all 99.9999999x10000^2% the same.
So, why is it a problem to have white pride?
To answer this, here's an analogy:
Is there such thing as a men's run? Is there such thing as a men's museum or can you study just a man?
No
But, how does this relate to white pride?
The answer is, the white male is the most common person in most of North America. Coincidentally, the white male is also the guy who is studied when it comes to diseases.
The white male is also the guy in most of the generic commercials on tv.
So, there's no need for white guys to have a desire to have pride because there's simply, no need.