All Greek to me.I can't understand PC.

The more difficult, the more right. To be disappointing, it is truth. I often was pointed out "your writing is too difficult to understand or too abstract."But sometimes, the truth is very clear.So, I sometime use an allegory. An allegory story is difficult to use. It looks like a knife. POLITICAL INCORRECT expression is often useful very much.
"Nothing is more dangerous than a crazy having a knife."(気違いに刃物）Japanese often use this expression behind.This phrase is a banned phrase in Japanese media for the human right of mental disorder persons.
It means that an abnormal person shouldn't have a dangerous object. Having respect to PC code, I must say as follows." We must help a mentally challenged person to be dispense with tools by which we might have unfortunately accident."
Anyway, No doubt,SHOOTERS in UNIV. and street slasher(AKIHABARA) on busy street are in lunacy. Of course,they are not worthy to question their motives.