Well, to one who insists on looking through gospel eyes, one can see deficiencies in both paradigms. Not all Indians were evil; not all cowboys were good. Stereotypes invite the conflation of ultimate good and evil with their dwelling places among men.
At least some cowboy vs. Indian battles were to the good, however. None of this stuff based on stealing could be to the good. (Now if it was a Repo Man theme that might be better. Just as an idea to toss out there.)
The cowboys and Indians we played was very basic, we were quite young, and the main fun was figuring out how to “die” the most dramatically. We actually had a lot more fun playing just Indians - making tipis, making pretend fires, gathering berries, just imitating what we read and heard about the Indian way of life. We lived on acreage with meadows and woods so there was a lot of room. Perfect place for kids, then.