The Chicago organization was recognized as a seperate "family" on every possible national mob meeting or commission in the past. Dont forget that being "made" in the Chicago Outfit was never the same as being "made" in the rest of the national Cosa Nostra families, not untill the late 1970's.And thats why the Chicago mob always had non-italians as members of the organization. Even in the late 70's and early 80's they had a non-Italian boss on the ruling panel.

As for Capone, we can never know for sure what would've happened. Nitti has done worst, and he didnt get whacked because of it.Instead he killed himself. During Ricca's control over the Outfit, he never ordered the murder of any boss and they all made big mistakes during their careers.Looks like Ricca played by the rules