We have shifted our focus in recent decades
And I do agree, in principle, that it has been in the wrong direction. We have, as a rule, become entirely too focused on why the crime is committed, and not on the crime itself. Other than as an object of intellectual curiosity, once you get past the point of discovering justification (self defense), why should the reason matter? It doesn't change what happened to the victim one bit.
As to the voter issue, who is most at fault, those deliberately signing up ineledgible voters, or the state for failing in their responsibility to provide adequate resources to meet their obligation?
All else being equal (and it almost never is) bigger bullets tend to work better.