Don't view it as a "judgement" as much as you should view it as reasonable skepticism. Is being "white" inherently a bad trait? Absolutely not, especially if you're looking at this very superficially. However, it's important to consider that "white" is more than just ancestry, and it's embedded in a social construct that has enabled oppression and racial strife for a significantly long time throughout history. This means that there is absolute validity in the truth that white people can be much more half-hearted in supporting leftist causes than POC because not being able to view things from a lens of intersectionality is absolutely a hindrance to leftist ideology.

Experience matters, and being white brings an experience of racial privilege that makes you blind to how bad the plight of POC can be. It's crucial to view this less as a "mean, rude, racist judgement 😡" and more as a "wake-up call and invitation to white people gaining awareness on how to be so much better".

To condense this matter down to "You're judging people by innate, immutable characteristics like race!" without taking into account the implications and intentions of such a sentiment is seeming willfully disingenuous.