Why did the arrival of irish and german immigrants lead to a growth of nativism within the united states

The unrest, unemployment and hardships they were experiencing back home are the reasons for the massive Irish and German immigration in the 1840s. Specifically, there was famine in Ireland during this time because of continued crop failure. Meanwhile, German immigrants came seeking freedom from the economic turmoil, and the civil unrest that would eventually lead to the 1848 revolution. These groups would experience discrimination at first but would later successfully integrate with American society your welcome

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false articles of confederation, ultimately building a new government and new constitution with an executive, legislative, and judicial branch and a system of checks and balances.