BTW, my comment was not meant to denigrate Buddhism but to make the point that, by comparison, if Buddhism is a religion, so is atheism (defined as a non-belief in God by its secular humanist adherents).
As an aside, much (if not all) of Zen Buddhism fits nicely with the teachings of Jesus.
True, it is difficult to decide. When I met my teacher he had been a Buddhist for 21 years and he said he still couldn't decide if it was a religion or not. FWIW there are no beliefs that need to be embraced in Tibetan Buddhism.