Business International radical?

I worked at Business International starting in the late 1980s, a few years after Barack Obama worked there. As I've written, I think Obama glamorized things considerably in his description of the organization, making it sound like some lucrative fast track he turned his back on to be a community organizer, when in reality it was a rundown operation rife with ill-paying, dead-end jobs. However, I'm rather puzzled -- and unimpressed -- to see assertions now that Business International had a connection to the leftist Students for a Democratic Society in the 1960s. Whatever their contacts may have been, the idea that BI was some kind of hotbed of radicalism is even more preposterous than the idea it was some high-powered corporate gravy train.