All the usual whiners about "political correctness" are, of course, missing the point. Buffalo Soldiers doesn't suffer for showing the truth about racial disparity. It suffers for only showing some of that truth while at the same time being dramatically weak.
For instance, it's obvious the Whites are for the most part either outright hostile to the Black and Native Americans -- which is historically accurate -- or else treating them as invisible -- which is also historically accurate. The whiners may not like that, but maybe they need to take that up with their culture.
Where the story falls down is in not fully examining the combined racism toward the Native Americans. Now, it's historically true that there was less animosity among the minorities toward each other in the old west, including the Black, Asian, and Native Americans stuck there. That doesn't mean there was universal peace, but minorities were allowed to marry one another, for instance, while they were shunned or forbidden to marry someone who was not a minority. But this film, in focusing on the racial tensions between the Whites and Blacks, generally overlooks their combined hostility toward the Native Americans.
The other problem is the script is wildly uneven, lacking much dramatic weight. Oh, yes, there are some tense scenes, but they're also frequently undermined by melodramatic dialogue that reminds you you're watching a TV movie. The pacing is not like a film but more like a few episodes of a TV series hastily patched together.
As with a lot of film and television of the past 40 or so years, more attention is paid to the technical aspects than the artistic ones. So, for instance, they get the uniforms and weapons basically right. They film on location. If as much time and effort were spent on polishing the script and editing the finished product, it might have been much better.
