Reading this thread it is hard to be objective. On one sense the Jackson family was a close unit and MJ found his success initially as part of the family unit, but early on many noticed he had a greater singular talent.
I think the family really tried to show their support at both trials. La Toya stabbed him in the back at the first one, but then regretted it. Katherine attended the court every day of the trial. But after 2005 they expected lots of money and support off MJ when he had his own problems. Michael was a good son overall to Katherine.
The problem was Joe Jackson, had he not been such an abusive megalomaniac, MJ may have been closer to the other. joseph only cared about how much money he could exploit off his kids. At the start it may have been about given them a better life and getting them off the mean streets, but once he knew they had talent, it was his impetus to squeeze every last dime out of them.
Michael always hated Joseph and did all he could to get him out of his life, to be honest if I had a father as abusive as Joseph, I would leave him too. At the end of the day, he made his sons lives misery, all married young to get away from him except MJ. Katherine put up with his crap and philandering all those years and I am sorry to say, I never liked Joseph either, he was just an evil man, and in many ways the blood is in his hands over MJ.