Knife crime and the downside of diversity

Subject: Knife crime and the downside of diversity.

The truly shocking thing about this spate of knife crimes, largely in our cities, is the callous disregard for life these attackers have for their fellow human beings. This latest killing this morning seems unprovoked. The 17 year old girl was not a member of a gang and seems to have just been walking through the park when she was stabbed in the back.
For certain young people a knife, like a gun carries the kudos of a threat towards an enemy and the excuse one often hears is that young boys carry knives to protect themselves from attack. If the violence within a gang is regularly visited by fights with other gangs then it's self evident that people will use their knives and people will die. But this stabbing is different, as is the case were victims are pursued and stabbed when caught. The final use of a knife or a gun, even more so a knife since a gun is a more random, remote weapon where a knife is the extension of the hand and the decision to plunge the knife in the body is a very personal thing. 
The phenomena of violence on the streets has been with us for time immemorial but there is a massive difference between a fist fight or a general street melee and the use of a knife with all its probable consequences. A fist fight used to be a right of passage for a boy a sort of claim to manhood, of being able to stand up for yourself in a disagreement which had got out of hand and threatened your pride. To plunge the blade of a knife into someone is of a very different mindset and one wonders where this mindset comes from.
In Glasgow in the 50s the gangs used to arm themselves with razors and did terrible damage to the face of an adversary but death was never the intention. Today amongst these teenagers death must be the intention. 
Drug wars and boys high on drugs might go someway to answering the question. 
Video games which focus on killing and involve the participants by immersing themselves personally with the idea of killing might provoke an overflow into reality. The racial tensions and religious tensions which are prevalent today in Multicultural Britain may be a factor. 
What ever the cause it's not going to get better if the mental attitude towards other human beings doesn't improve, which seems unlikely. 

There were always people from other distant societies who because of the environment they grew up in, a violent environment where murder was accepted as a reflection of the structure of society. The Nigerian is feared, the Romanian and the people from the Baltic states in general were anecdotally more inclined to to kill for revenge than we were in this country. With 'free movement' they are now here living amongst us and whilst we praise the advantages diversity, it also has its downside.