Hi, LG. I don't think of it terms  in terms of idolatry so much as unhealthy preconceptions. There was a time when the American citizenry generally bought in to the notion that the government was always benign, always acted in the best interests of the citizenry and, where foreign policy was concerned, was always on the side of the angels. Gadflies like Daniel Berrigan challenged that notion. 

People like Berrigan aren't always likable, nor do their uncompromising viewpoints always make sense. But they do contribute something of value to the national conversation.

As for whether or not he's a saint, only God knows. Literally.