The problem is that you are woefully ignorant of relativity theory (the information on your new favorite page is decades older than the 1990s) and you are so angry at the world that you would rather rage on in false certainty than bother to learn.
You know, when someone acknowledges** their error, it is customary to not pile disparagement on top of disparagement. Kudos to danshawen. ** about as common as hen's teeth - doubly so on the internet
That was not acknowledging an error, that was more disparaging of the entire history of physics from 1905 to the present.
His error was pretending he knows anything about mathematical physics to start with. Pretending he learned something doesn't count as an apology. In my book. It's slightly better than no attempt at all. At this point the only apology, I'd buy, is where he details his mistakes and how to fix them.