you are confusing racism and prejudice, but from your doubling down, seems like you're confused quite often.

You don't have to be rude, they are literally using the word racism as defined by dictionaries. There are two separate definitions usually listed, one is belief in a races superiority over others, the other is the systemic bias against a racial group. Since 2020 at least it's been common that people have used it to mean specifically only the second definition and use other terms like racial prejudice for things like prejudice against white people but it's used that way still plenty.