I'm guessing that Michael had the same relationship with his family that some of us have with our own family. Some times we see our family a lot, and then there are times that we don't want to be bothered with the family, for whatever reason, but when a time of need arises, we know how to put our differences aside and come together as a family.
I come from a large family also, and sometimes I'm close to them and some times they get on my last nerve (LOL), but if anything goes down, mad or not mad, they all know they can count on my support. I think "most" families are like that.
ONE THING that does give me a little pause is the fact that Michael went from wanting his children to be raised by his mother and after that he chose Diana Ross. I would have thought with all of those brothers and sisters and other adult members of the Jackson family that Diana Ross, a non-family member, would have not made the cut. When it comes to family relations, that piece always stuck out for me.