Just like the vast majority of right wing culture war BS, the actual amount of times where their imagined worst case scenario occurs is greatly overestimated compared to the effort they put in trying to make it seem like it’s a world-ending threat looming on the horizon.
Yes, I do think there are places in which the moment it’s found out that you’re a Caucasian male your chances are essentially close to 0%. Those are usually due to someone in HR being way too concerned about their company being ousted on social media with one of those “Oops, all white” images taken during group photos.
There are also colleges and university, places with a known concern for… shall we say social media-driven astroturfing attempts, specifically due to the vast majority of their clientele being what can best be described as “terminally online” and trying to put to use what they’ve learned in class without the actual knowledge of how things work outside of their campus.
Those are the most common cases of “white racism”, and they are in no way, shape or form as detrimental, prevalent or persistent as your usual case of discrimination based on skin color going the other way. While I do think it’s going too far to claim that anti-white racism straight up doesn’t exist or should immediately be discredited, it is difficult to take seriously anyone trying to bring up that infinitely smaller issue as leverage, compensation or even justification against the proven concept of racism against someone with even a little bit of melanin in their skin, to the point of it having gone systemic centuries ago and normalized in culture and society.