Because you're racist against white people.
"All white people are privileged" is a racist belief.
The former is accurate, the latter is not. Usually people mean the former, even if it's not explicitly said.
They operationalize their racist beliefs by discriminating against poor and powerless Whites in employment, education, and government programs.
The former is accurate, the latter is not. Usually people mean the former, even if it's not explicitly said.