It's called dictatorship. In a representative democracy when elected officials don't follow the will of the people they are replaced. >>
When elected officials allow mass murder on their watch they are removed and imprisoned, and spat upon by history. When they give up, they are mocked and not elected.
If you think it's dictatorship, go to a land where killing weaklings is government policy. Take a time machine to Germany, 1939.
And what U.S. government officials have been removed and imprisoned for mass murder recently? By your logic then, mass murder must not have occurred.
Or go to present day Holland.