"Crimes Against Humanity"

I don't get why the names of mascots are so controversial. I feel like the names are not meant to be racial or anything like that. I understand why people would get mad about them if they were putting a bad name out there against Native Americans, however, if they are not doing that then I feel that there is nothing wrong but that is just my opinion. I do feel bad about people getting offended by the names of the teams. Although, I have never put that much thought into the names of team mascots which has broaden my opinion about this situation.