In the 1930s, the city inhabitants also suffered from the controversial Soviet political policy of that time. While encouraging lower-class Ukrainians to pursue careers and develop their culture (see Ukrainization), the Communist regime soon began harsh oppression of Ukraine's political freedom, autonomy and religion. Recurring political trials were organized in the city to purge "Ukrainian nationalists", "Western spies" and opponents of Joseph Stalin inside the Bolshevik party. During this time, numerous historic churches were destroyed or vandalized and the clergy repressed.