There's going to be more and more of these kinds of cases of people identifying as a different race/ethnicity.
Critical race theory (and gender identity theory) seems to create / exacerbate a sort of neuroticism in many of its fervent disciples.
In CRT, white people are framed as the eternal baddies - responsible for any and all the evils in the world, while people who aren't white are pure of heart and always 'oppressed'. Being white means you are tainted with the everlasting sin of being an 'oppressor'. The type of white people who turn to CRT seem to have a deep self-loathing.
If you are white, and the ideology you immerse yourself into is based on the premise that white=evil, then it is not surprising that many of these people demonstrate a clear desperation to 'flee' this category and posit themselves as anything else that isn't 'white'. I don't think it's deliberate or conscious. It's driven by deep seated self-loathing and a desire to not be seen as a bad or evil person. People are capable of convincing themselves of all sorts of nonsense to ease their guilt. Some people of course will be deliberately manipulative and trying to game a system that rewards and valourises victimhood, but I think these early types are all eager to disassociate themselves from the stain of 'oppressor'. It's an inevitable result of the simplistic oppressor/oppressed narrative that is so popular now.