During the industrial revolution immigrants from Ireland, Italy and Eastern Europe settled in Scotland. Demand for housing and employment increased. There were divisions between some communities.
As the industrial revolution progressed and urbanisation increased, new housing had to be built to meet the demand of the newly arriving workers from the countryside, as well as from Ireland, Italy and Eastern Europe.
Irish and Jewish groups settled in close proximity to each other, more so with Catholic immigrants. This often happens with immigrant groups, especially if the host nation is hostile towards the immigrant group.