why were they all white?
it's (somewhat) odd that all of the main character's former associates were all Caucasian (and Mimi was, apparently, of Scottish origin?); during the time-frame that these people reportedly were operating, the civil rights movement was still top of mind for much of the country, and there were african-americans and other minorities involved at the forefront, as well as whites.
"With Great Power Comes Great Responsibility"
Stan Lee, 1962