A few people in the replies are calling me a liar and quoting crime figures from the past.
I grew up in working class south-east London in the 1960s. Lewisham, Norwood, and Sydenham. Throughout my teenage years I never heard of anyone being stabbed. Nobody I knew had ever been stabbed. Nobody I knew carried a knife. When we went out for the evening, we never worried about being stabbed. We might get into a fistfight occasionally, but knives were never involved, because diversity was never involved.
Unwanted mass immigration from barbarous cultures where life is cheap has fundamentally damaged our society and made it more violent and dangerous, and that is the long and the short of it.
Nobody ever got stabbed when I was a kid. I had a hunting knife when I was in the boy scouts. I wore it all the time.
We all had knives in the scouts. Nobody ever thought of stabbing anyone.
Of course we had the advantage of being civilised.