I am fascinated by Worcester’s growth from an agrarian county seat to an industrial powerhouse. This change upended the old social order. Unfortunately, nativism was a byproducts of the rapid influx of immigrants to the city. In the election of 1854 the strong anti-immigrant Know Nothing Party ran the table in Massachusetts. In the 20th century the KKK was not just a southern phenomenon, but found adherents in the north as well. WGBH produced a story on how the KKK rose and was violently defeated in a 1924 riot between the KKK and the Knights of Columbus at aptly named “Cultural Fairgrounds.” Worth a read/listen.