While no army is composed of highly emphatic saints, armies differ in their general level of violence toward non-combatants, cruelty, how pleasurable they perceive killing and so on and so forth. Ideology and reward system have to do a lot with how army or specific unit behaves.
The original claim was about this particular unit. Assumption that they are representative of all brown people is wrong. Plenty of brown don't subscribe to this ideology.
Armies indoctrinate and socialize people differently. Implying racism on part of people who don't extrapolate one unit of one army behavior to all of them is not great tactic.
