Yep. This isn't just getting it wrong, as movies often do. This isn't having to combine characters or chisel away a few facts for dramatic coherence.
This is pure racist propaganda. It turns a brutal elite group of warriors charged with doing their empire's dirty work where imperialism and slavery were concerned into brave and heroic superstars. It completely flips the truth and facts of the period to maintain the 'all White Westerners are Nazis, all others exceed Jesus in superior virtue' narrative of the modern Left. In so doing, it appears to rewrite the actual history of the subject in a way that would make D.W. Griffith blush.