@wandeljw,
I suppose, wandel, (and I'm sure, your father even knows it better) that in many countries at all time periods some history 'textbooks' were biased.
When someone studies history - that's from college level onwards = becoming an historian - he/she will (finally, actually history teacher at school should teach as well) be able to see such.
(Our profs here sometimes give their teaching manuscripts as 'scripts', but
textbooks at college/university level?)