Bias against ethnic minorities 'needs to be tackled' - or does it?

http://www.bbc.co.uk/news/uk-41191311

is the article telling us ' People from black, Asian and minority ethnic (BAME) backgrounds make up 25% of the prison population in England and Wales and 41% of the youth justice system, despite these groups being 14% of the general population,  .......Mr Lammy said it was "well established" that there was an over-representation of people from minority backgrounds in the criminal justice system, but his report was about looking at their "treatment and outcomes"....Mr Lammy said: "It is clear to me that BAME individuals still face bias."

Do they? Later 'The report points out black children are more than twice as likely to grow up in a lone parent family, and black and mixed ethnic boys are more likely than white boys to be permanently excluded from school.' So are schools prejudiced? Or do single parent families produce less disciplined and therefore more lawless children? 

The report is yet another manifestation of the fallacy of proportionality. If a disproportionate percentage of offenders come from one particular ethnicity, logic does not mean bias in the justice system. It probably means that group is more given to that kind of criminality.

To reinforce my argument look at the proportions of people in prison by sex? Are courts biased against men or is it that men are more likely to be criminals? Look at the proportions on people in prison by religion. Why are the numbers of Muslims  a far far higher proportion in prison than in the general population? Are courts biased against Muslims or are Muslims more likely to be offenders due to lack of respect for British law?

So back to the report. Lammy should be asking why may BAMEs are more lawless not looking merely at court bias. He should start with some analysis of diverse groups within BAMEs. He will find some gross disparities.