The Peekskill Riots surrounded a concert by singer and activist Paul Robeson. His stances on political and civil rights issues and his communist affiliations catalyzed protests that were fueled with an undercurrent of racism and antisemitism.
Research:

Robert Moses and the Shaping of New York, Part 2
42:12

Robert Moses and the Shaping of New York, Part 1
41:59

SYMHC Classics: Eradication of Smallpox
43:25