The 1950s were the time of especially violent Cold War with the Soviet Union. The Soviet Union was a communist state and the state promoted atheism -sometimes referred to as state atheism. The United States promoted atheism to stress their difference from the Soviet Union.
Answer:In 1912, Lenin, then in exile in Switzerland, appointed Joseph Stalin to serve on the first Central Committee of the Bolshevik Party. Three years later, in November 1917, the Bolsheviks seized power in Russia. The Soviet Union was founded in 1922, with Lenin as its first leader. During these years, Stalin had continued to move up the party ladder, and in 1922 he became secretary general of the Central Committee of the Communist Party, a role that enabled him to appoint his allies to government jobs and grow a base of political support.
After Lenin died in 1924, Stalin eventually outmaneuvered his rivals and won the power struggle for control of the Communist Party. By the late 1920s, he had become dictator of the Soviet Union.
Answer: Very few groups in the 1960s advocated violence, except the US government, in the form of military adventure, where they went far beyond advocating. A total of about 1,353,000 deaths occurred on all sides in the Vietnam war. Then there was/is the Klu Klux Klan. We need to be watchful even now. The Weathermen were a small organization and they claimed not to intend violence, but use it if “necessary.” The Black Panthers called themselves a party of “self defense.” Whether or how often individuals in the latter two groups deviated from their charters (if any) is hard to determine.
Anyway people can justify their actions of violence it doesn't mean it was justification for everybody.