Authored by John Derbyshire via VDare.com,

Race-denialism is all over the Western world - the notion that race itself is a sort of optical illusion; that different races can, after a bit of social engineering, be brought to present the same statistical profiles on all traits; that when they present different profiles the only possible explanation is malice on the part of white people; these are the great dogmas of our age [Antiracism, Our Flawed New Religion, by John McWhorter, Daily Beast, March 14,2017 ] carved on stone slabs and worshipfully preserved in the temples of our culture. Here's a cute example: the epidemic of knife crime that has been plaguing Britain for several years past.

Guns are hard to get in Britain (although not that hard). So the more commonplace types of lethal interpersonal violence - notably underclass gang warfare - are stabbings with knives.