Is it OK for a Presidential candidate to be friends with terrorists?

Having endured the 60's, I recall the Weathermen Ayers, Bernardine Dohrn, and others. They were a scary lot. Upon learning that Obama served on the Woods Fund board with Ayers and went to Ayers' house combined with the Black Liberation Theology preached in his church, and Obama's mother's background at Mercer in Seattle, one can only wonder about Obama's propensities.