While this occurred in France, we could learn an important lesson.  Mental health problems have increased substantially since services were cut way back in the 1980s. The issue has become even worse with the number of veterans who have returned from war (one of which never should have occurred).
It's time to step up to the plate  (i.e. pay  targ taxes) to help the mentally ill obtain good,  effective treatment. Don't expect the Republic party to support that idea - in any significant,  meaningful way.