All myth and hearsay sites in my experience. Lots of inaccuracies portrayed as fact and nothing credible unfortunately. I find it dangerous people believe in Internet sites they don't even know, and then swallow it all as 100% fact. That is astonishing. Baffling further is if you've read all these sites and believe in their logic, why is it you can't refute or comment on my explanations? Seems to me you'd be an expert in parroting their views. It should be easy, no?
The school textbook thing is sick and proof to me this is more politically motivated than anything else. It is much like the global warming hoax, which I'm sure is being taught as well.