The idea that context is irrelevant, and thus it's a double standard for black pride/brown pride/Mexican pride to not have the same connotation as White Pride is foolish.
The current understanding of what people mean when they say White Pride is based entirely on how the term has been used for decades if not centuries. It was racist whites claiming racial superiority who turned the perception of White Pride, not the actions of any minority group.
It's like the swastika. Sure it was once a symbol of peace, but it was tainted, likely forever, by the Nazi party. Don't blame people for seeing it's most common meaning, rather than some alternate meaning you might apply to it.