The idea that someone who does not presumably know the language, culture, or even where all the landmarks of a city/nation are suddenly start running organized crime is deeply mistaken and does not even track with the most well-known syndicates such as the mafia (1920s in NY compared to 1880s enmasse arrival of Italians) or cartels ("homegrown").
Look deeper and you would see these syndicates grew because there were purposefully and one might argued, promoted by semi-facist types or those who would get "cancelled" today, preventing reasonable opportunities from being provided to these populations.
Even moreso, you might see that much of our economy depends on deeply underpaid labor continuously running agriculture and service sectors and now I would argue even tech, with the danger of being deported or not getting a visa hanging over their actions.