These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
YMMV: The Defence of Duffer's Drift
Values Dissonance: Imprisoning civilians and shooting their livestock are generally not considered to be valid counterinrgency tactics in the modern era, mainly because it no longer has the same effect.
BF advises himself to put the "lazy Kaffirs" (aka African natives - and yes, Kaffir is an extremely offensive term nowadays) to work and dig trenches for the soldiers, probably so the soldiers won't get to exhausted or upset. The white Boers do not receive that treatment.