Would society be worse off if we rounded up all people with this mental disorder and killed them?
thats what the national socialists did and despite that they were pretty horrid at the top
maybe take a note from history and realize "just remove the bad people" isnt as simple as that, let alone a solution to societal ills even if it were done.
you should probably watch death note and see if there are any correlations to how you think and how the main character acts