Mankind have our little moral sphere. The boundary of the moral sphere is drawn with the motto of "no harm, no problem". Within the boundary of the moral sphere, everything is relative, everything is tolerable.
But as soon as people leave the moral sphere (i.e. doing harms), things become very messy. We try not to think about them, until they bother us too much. Those are the serial killers, the terrorists, the cheese burglars.
Sometimes we try to re-invite those outside of the moral sphere to rejoin our little shell. Shall that fail,
violence, the Final Means, is the only way to resolve the problem.
And the problem for modern day is we use the Final Means much sooner than things get very final, and sometimes we use the Final Means at the very beginning. We are not much smarter than a laboratory mouse.