Todd Gitlin and Liel Liebowitz thought they knew about the concept of the Chosen People, and even set out to write a book about it. Moving from their uninformed stereotypes into being informed made them change their minds dramatically: which they're eager to admit. The book, by the way, is here The Chosen Peoples: America, Israel, and the Ordeals of Divine Election.
J-Street tried to convince everyone their donors were lots of run-of-the-mill well-meaning American Jew. Alas, this seems not to have been true at any point in time. There was a lot of excitement in the blogoshpere about this over the weekend; I'm sending you to FresnoZionism because he seems to have done the deepest digging into who is supporting them. It's pretty weird.
The Huffington Post would have you believe that Israeli settlements cover 42% of the West Bank, a statement which is patently false to anyone who's ever been there, but is also contradicted by their own article. Is it possible someone made a dishonest editorial decision when formulating a headline? At a respectable news outlet?