Stats need to be informed by every variable--that especially includes race, age, nationality, sex, etc. I think a huge factor in why the news is silent on pointing out diversity is the fear of bigotry and thus cultural bias. I say it's not bigotry unless you are imposing a value judgment upon the group in question. Demographics and crime reporting is the one exception. It is bigotry when demographics plays into crime reporting. There is a clear established devaluation of criminals which can be projected onto the person's cultural identity.

Why is that an issue? Crime is more complicated than to say race is a factor. People are not statistics. Free will is not informed by a persons cultural identity. Choices are choices, no matter what background you have. Perhaps crime is higher in some groups because of other factors that the group faces more than other groups. Poverty, oppression, urbanization may all be factors affecting crime rates. And, because these are all more prevalent in some races more than others, it may seem that race is correlated when it most likely isn't.