If you did mean German and not Germanic then your comment is, alas, false.
Between 1850 and 1930, about 5 million Germans migrated to the United States with a peak in the years between 1881 and 1885, when a million Germans left Germany and settled mostly in the Midwest. Between 1820 and 1930, 3.5 million British and 4.5 million Irish entered America. Before 1845 most Irish immigrants were Protestants. After 1845, Irish Catholics began arriving in large numbers, largely driven by the Great Famine. 1
1 Jay P. Dolan, The Irish Americans: A History (2010) pp 67-83