One reason is because the republicans feared immigrants who would support the Federalists future elections.
Another reason is that the Antifederalists wanted to gain more members so they passed the act in order to welcome those entering the country.
The alliances system meant that a local conflict could easily result into an intimidating global one. The overall cause of World War was the assassination of Archduke Franz Ferdinand. Nationalism was a great cause of World War one because of countries being greedy and not negotiating.
Your welcome I don't know if that helped. But yea.
Answer:
federalism
Explanation:
Because they are ruling against something that would have been a law so it's federal