Also, do mobsters form alliances with other Aryans/white prison gangs? I've read about this, but don't know if this is common or isolated incidents. It would make sense since everyone sticks with their own race in prison.
I would think so. After John Gotti was assaulted in prison by Walter Johnson, Gotti made a alliance with the Aryan Vanguard offered them between $40,000 and $100,000 to kill the black inmate who attacked him. In
Gotti, the 1996 film shows John Gotti (Armand Assante) making peace with the leader of a black gang. I would imagine it mostly as a bunch of Italian-American mobsters doing time with no problems at all, but then there’s Lucchese crime family associate Tommy DeSimone was rumored to have killed four people while in prison. It really depends on the gangster incarcerated.