As far as irish organized crime goes, they did't even challenge the itallians for the rackets, they fell in line and started working for them, if the irish would have maintained contact with gangsters from ireland and organanized irish in all cities they would be a force, now is a good time for them to take the rackets back because the itallians are weaker and they don't want problems
what exactly do you mean when you say them? the only place that even has something that resemblance an "irish mob" is boston and ever since the fall of whitey bulger theyre in much worse shape than the Italians. and also have you ever heard of the white hand gang from the early 1900s? they formed to compete with the growing black hand gangs but in the end the Italians were much more organized than the irish.
