There are probably a lot of intertwined reasons for these, different for each job category. Culture, racism, geography are the big categories. A lot of job choi

There are probably a lot of intertwined reasons for these, different for each job category. Culture, racism, geography are the big categories. A lot of job choices are about knowing people who know people who do that job or having family history in that profession. All these interact. So maybe steel unions were racist a generation ago and admitted fewer blacks. Then we have fewer sons and nephews of steel workers and so fewer people likely to go into that profession. There are all sorts of professions that are "Jewish professions." The history of these is both speculative and complicated. You had a cultural tendency towards literacy when this was uncommon. Racism & transience preventing land ownership & farming (most Europeans' job) which lead to urban populations and non land assets. Certain guilds barring Jews girded them into unguilded professions or guilds without these rules. There were competitive advantages from transience (contacts in other places) that encouraged certain professions. Then you get interacting second and third and forth order effects from having one set of grandparents that were actors another set who were merchants, the industries that exist in the place you live (not everyplace has many Jews), etc. Some of these professions might be dominated by some subgroup of white, like descendants of Polish immigrants or late 18th century migrants. There is no reason to expect that the ratio of whites in a certain profession reflect their overall ratio in a country. Professions aren't randomly allocated. IMO, more interesting would be the Blackest, Jewiest professions or some other minority and trying to figure out how that came to be.