If not 95%, it's still a significant percentage especially considering the demographics of the population as a whole.
If knife crimes being committed by blacks are decreasing then perhaps this is a result of the police focusing their resources on them?
And yes crime correlates with poverty, but the UK is not a third world country. Just because your parents were poor, uneducated and turned to crime doesn't mean you have to. The government provides free schooling and various opportunities for everyone but it's still your choice wether to take advantage and your own fault if you don't. I know many people who came from poor backgrounds and were able to get a decent education and subsequently get reasonable jobs.
