Barton left the Magpies for QPR in 2011 and admits he 'fell out' with the hierarchy at St James' Park.
Indeed, the 32-year-old says he couldn't 'buy in to' what owner Mike Ashley was doing at the club.
“I fell out with the hierarchy at Newcastle," he told the Daily Telegraph.
"With what has come after at that club people have seen what the owner [Mike Ashley] was attempting to do. I didn’t feel I could buy in to that. Being one with the fans has always been massive to me."
Barton at QPR
It was not plain sailing when Barton moved to west London, however, as he freely admits.
The midfielder was loaned out to Marseille at one point and Barton blames himself for the arrogance attitude he displayed during his early years at Loftus Road.
In describing his form for QPR during that time, the 32-year-old has chosen a four-letter word that illustrated just how badly he thought he played.
"At City I got on well with the fans, at Newcastle I did. Here I didn’t. I came from Newcastle and felt with the QPR fans ‘you should be thankful I’m here’ which was the wrong attitude. I played crap for a long period."