Your argument that over-sensitivity to imagined racial slights isn't a real issue would be more convincing if you weren't using it to bolster an absurd claim that giving Fantomah an Egyptian origin story is an example of "whitewashing" (without having even seen the story), thereby providing a perfect example of the kind of nonsense I'm talking about.
If anything, this is an example of the phenomenon of reimagining characters of the culturally normative group (e.g. white/male/straight) as a "minority" (POC/female/gay) in an attempt to be more politically correct.
I find that the rest of your post is an attempt to change the subject to other topics, and responding to it would just confuse the issue. I will say a few words about hair color, though:
You've not convinced me that white hair is not, in general, seen as a sign of infirmity, even (or especially) in young characters. The best example I can think of in comics is Hippolyta Hall in Sandman. Even when white is seen as representing platinum blonde hair, I think it's tied in to a stereotype of the spaced-out, childlike blonde - seen as mentally or emotionally weak. The fact that not every character conforms to this pattern just shows that hair color is not rigidly coded in our culture, and - as you say - must be seen in context. The site hosting the comic is back up now, so you can see the context for yourself.