That's a bit of a sweeping statement, don't you think? Many of us are well aware of Michael's health issues including the vitiligo. I haven't read all the way through this thread in a while but the discussion, iirc, was pretty wide-ranging. And even if people feel that Michael's lyrics aren't strongly political that doesn't mean they think he was rejecting his ethnic heritage.
It is possible, I suppose, that some newer fans might not be fully aware of Michael's struggles with the vitiligo and the lupus but I would imagine they are in the minority. It doesn't take long for his health to crop up as a subject for discussion. People are not always aware of the difficult medical complications that can arise from either of these medical conditions. But that doesn't make them 'imbeciles'.