The Resurrection is the central theme in every Christian sermon reported in the Acts...The first fact in the history of Christendom is a number of people who say that they have seen the Resurrection.
In many respects I find an unresurrected Jesus easier to accept. Easter makes him dangerous. Because of Easter I have to listen to his extravagant claims and can no longer pick and choose from his sayings. Moreover, Easter means he must be loose out there somewhere.