This is a red herring.
Nevermind the accuracy of your premise, the conclusion effectively excludes an entire racial group from celebrating their identity—their accomplishments, culture, and heritage. That is objectively unfair and morally wrong.
Most people aren’t comfortable acknowledging the underlying core issue with white identity: interracial valuation disparity.
It’s difficult to maintain an overinflated sense of pride in one’s own identity when its value or merit is measured against the standard of white European heritage and its accomplishments.
This is precisely why Marxists target our heritage and morally invert our history—e.g., tearing down Civil War statues, demonizing colonial roots, etc.