Complex sentence: They supported the growth of labor unions, the civil rights movement, and the War on Poverty simutanously opposing totalitarianism and Communist Party rule, Cold-War liberals therefore supported efforts to contain Soviet communism.
Split into simpler sentences: They supported the growth of labor unions, the civil rights movement, and the War on Poverty. Opposing totalitarianism and Communist Party rule, Cold-War liberals therefore supported efforts to contain Soviet communism.