For most of D&D's audience, anything resembling typical attitudes from the past is also breaking strong modern taboos -- and I suspect few modern players could play along with casual racism, sexism, nationalism, etc. without overreacting either against it or (nervously and "humorously") for it.One of the things that's been lacking in D&D, in terms of challenging the status quo, is the thinking. Everything is done up in modern terms in view of how people act, how they treat each other, etc...
If you read enough history -- especially primary sources -- you learn to take such attitudes for granted, but many players struggle with even the littlest things, like lords expecting loyalty from their subjects, everyone understanding their station, etc.
So, if your group enjoys real history -- or pulp fiction by authors, like Howard, who read real history rather obsessively -- go for it. Otherwise, accept that a quasi-medieval mercenary company happens to have 21st-century university student values...