Obama's days at Harvard have been shrouded in secrecy. But a new video lifts a corner of the veil, revealing his creepy embrace of the "Jeremiah Wright of academia."

It turns out his favorite law professor was the late Derrick Bell, a black radical who taught classes trashing the Constitution as racist.

He liked Bell so much he led a law school "strike" in support of him in 1991, when the professor went on unpaid leave to protest the lack of affirmative-action hiring on campus.

A video clip posted by Breitbart.com captures Obama praising Bell for "speaking the truth" and hugging him.

Not long before this show of affection, Bell had been called into the university president's office to explain why he had sent him a letter filled with violent fantasies — including their own death from a bomb planted in his office by white racists. Bell explained that such extremism is what it would take to get the administration to agree to grant more affirmative-action programs.

Harvard's honcho wasn't amused. Bell groused he just didn't get it. But who would? Apparently his star pupil. And that's what's so unsettling.

Bell's nutty ideas — including that America is a "racist nation" carrying out a "quasi-genocide in the inner cities" — were well known to Obama. Bell came highly recommended by Obama's America-hating preacher Rev. Wright. He and Bell were pals. In fact, Obama just traded Wright's pews for Bell's desks.