Hate and extremist groups emboldened across Pa. last year Updated Feb 22, 2021; Posted Feb 22, 2021 The National Socialist Movement, one of the largest and most prominent neo-Nazi groups in the United States, was one of 36 hate groups active in Pennsylvania last year. Members of the group last summer gathered at a downtown Williamsport park. Facebook Share Last summer, a band of the National Socialist Movement, one of the largest and most prominent neo-Nazi groups in the United States, gathered at a downtown Williamsport park - swastika flags in hand- to spew profanity and white nationalist ideology over a battery-powered bullhorn. Weeks later, the Loyal White Knights of the Ku Klux Klan targeted several Erie County communities with two-page typed letters containing racist, homophobic, Islamophobic and anti-Semitic language. The same group distributed more notes a few days later, urging residents to “Pray for white Americans in 2020,” directing them to the KKK’s website and radio show.