The main difference is which part of Europe they came from, and the numbers of immigrants. There were many, many more "New Immigrants'" than old, 20 million people between 1880 - 1920. And the New Immigrants came mostly from southern and Eastern Europe, which meant they were almost all Catholics.
They didn't need to pay any expenses whatsoever. They were the main ones who could hold vital positions. Officers in the armed force. Nobles controlled peasants. They didn't need to pay most duties and gathered tolls from individuals utilizing streets and markets. Numerous nobles and clergy lived in awesome extravagance in chateaux and castles.
Answer:
When less sunlight reaches the northern latitudes, temperatures drop and more water freezes into ice, starting an ice age. When more sunlight reaches the northern latitudes, temperatures rise, ice sheets melt, and the ice age ends.