But you look at other players who have similar, in fact worse back grounds and they don't go around beating people up and punching team mates out when they are unconscious.
Look at Luka Modric, when he was 5-6 years old his house was in a war zone and lost his grandparents during a war. Or Nando Rafael who was born during the civil war in Angola, he left on his own aged 8. And there are lots of players from Bosnia; Sergej Barbarez (mum is Bosnian, dad is Serbian) was in the JNA Army during the 1990s in Yugoslavia then had to leave the city of Mostar just before the war was there, his dad sister and girlfriend left the city and made it to Germany to meet him, but his mum never made it to Germany. Same with Hasan Salihamidzic, he just got out of Bosnia before the war started. And you could argue that players like Carlos Tevez, Lavezzi, Marcelo Moreno, all come from very poor suburbs of cities in Latin America, much poorer than the worst parts of any UK city.
Anyway my point is this, these players (and many more) can become professional footballers, they can become role models (like Barbarez, captain of Bosnia) and they don't go around getting drunk and beating people up, and going to jail. They have had much worse situations than Barton (or anyone who lives their whole lives in a Western country) had growing up, and they don't turn into monsters.
There is no excuse for Barton, not even ignorance, he should be barred from playing again.