Nanakuli,

You should make an attempt to learn the difference between murder committed because of peceived grievances toward individuals (the Uyesugi killings by far Hawaii's and possibly the rest of the USA's best example) and murder to make a political point or to address an issue with a society or other large group.

Oh, and while many other examples exist in the USA and the rest of the world, I'll pick the one even you, an example of a run-of-the-mill S-A reader, should have read about in July 2016:

http://www.staradvertiser.com/2016/07/26/breaking-news/rare-mass-killing-raises-questions-about-security-in-japan/

Usage of "rare" in the headline simply means rare in Japan (where murder in general is infrequent) but not the rest of the world.

Google "Rwandan Genocide" if you care about another use of bladed weapons to commit mass murder.

If you can someday accept that dead is dead, then you will have come a long way.