Radosh is rock-solid. A former lefty, he knows whereof he speaks. And of course leftists hate him mindlessly for his apostasy. Somebody ought to explore the connection between the attitudes of leftists and radical Islamists toward apostates.
In 1949, sociologist Jules Monnerot described communism as 20th century Islam. To which I add: radical Islam is the communism of the 21st century.
See Ibn Warraq, Islam as Totalitarianism.