Hypocrisy and knee-jerking.

Three people killed with a knife, three people killed with a gun.  People refer to it as “the UCSB shooting”.  That pretty much says it all, right there.  Three people were killed in “the UCSB shooting”.  Should we not also be concerned with the “UCSB knifing”?  Why does it only matter when people are killed with a bullet?  Are the deaths of the first three to be blamed on the NRA as well?