Perhaps voters aren't being offered the tools to solve the root problems?
Scapegoating entire skin colors for systemic failures doesn't seem like it's going to make things better for anyone.
Indeed, but scapegoating people who are Different(tm) has a long history of being a successful political tactic, at least if you measure success solely in terms of getting elected.
What solution do you have in mind? And is it guaranteed to work? Because deporting the people who are massively over represented in crime is guaranteed to work.