It depends on the degree of mowing. As Machiavelli said, "do not do your enemy a small injury".
In 1918, Germany experienced a degree of mowing that may have made an impact on the returning veterans, but not on the people who stayed home and only read about the war in the newspapers. The result was that within 20 years they were back for more.
The experiences of 1944-45, Dresden, devastation of the countryside, etc, etc, made a more lasting impression, resulting in a disinterest for war lasting for many generations.
You are correct in that things have gotten to the point where just a few body bags will do more harm than good. Where I disagree with you is in the estimation of the number of body bags that will be needed.
Papa
So do I understand you correctly that you are advocating mass murder of rioters?