Hate talk radio goes back further than the 60s - back to the Roosevelt years. Coughlin, a Catholic priest, had a radio program during the late thirties entitled "Golden Hour of the Little Flower." Here is a sample program:
Jews Support Communism. There are whiffs of Beck and O'Reilly and Limbaugh in this smarmy, Christianoid spiel. He was insanely popular in his day.
After election, Coughlin’s radio speeches became increasingly anti-Roosevelt, calling the administration a “communist conspiracy and incipient dictatorship.” More disturbingly, he began to make increasingly vitriolic and anti-Semitic statements both on the air and in the pages of Social Justice, attitudes that had only been hinted at earlier in some of his broadcasts. His following, as Brinkley notes, remained large, but changed, and the throngs of crowds that waited to see him, and torrents of letters declined. After the election he reconstituted the NUSJ into cells known as the Christian Front organization, an extremist organization which included increasingly “violent and unstable” activities. One of this group's offices was raided by the FBI, and explosives were found. By 1940 Coughlin was effectively off the air, but continued his diatribes in his newspaper, where he expressed sympathy for Mussolini and Hitler, and even claimed the the Jews were responsible for starting World War II.
Father Coughlin: Radio Priest, Depression Demagogue