When Barack Obama came to prominence as a presidential candidate, his Chicago background—in particular, his efforts as a "community organizer"—reignited an interest in Saul Alinsky (1909-72), the hard-charging activist whose 1971 book, "Rules for Radicals," was said to have had a formative influence on Mr. Obama's thinking. Some critics worry that Alinsky's ideas guide Mr. Obama even today, in the White House. About such matters Nicholas von Hoffman cares little. But about Alinsky himself Mr. von Hoffman cares a great deal. He knew Alinsky, worked with him for 10 years in Chicago community groups and now offers a portrait of him in "Radical."
Von Hoffman, Nicholas. (2010). Radical: a portrait of Saul Alinsky. New York : Nation Books.
Alinsky's activism began when he left his studies and joined in labor-union agitation on Chicago's South and West sides. Before long he was organizing community groups in rent strikes and store boycotts, arranging safe passage for blacks on their way to jobs in bigoted neighborhoods, and conducting negotiations among feuding ethnic groups. He could be daring with his tactics, but he drew the line at jail: "Saul had an absolute prohibition," says Mr. von Hoffman. "He would explain that a staff person cannot operate behind bars." In this respect Alinsky's methods differed from those of his contemporaries in the civil-rights movement.
Emphasis added, for these are important points. Nincompoops on the right, even on the left, dismiss radicals far too easy with cartoonish looks and superficial characterizations.