Kalosyni I’m trying to make this as “easy” as possible for the purposes of an Epicurean comparison. My main point is that there have to be some core tenets among all Buddhists that give some commonality. Interpretations of what those concepts mean can vary greatly. But if a Zen practitioner and a Theravada monk cannot agree that they both take refuge in the Buddha, the Dharma and the Sangha because nirvana, samsara and karma are specific concepts expounded upon within their particular traditions by the historical Siddartha Gautama, then it will be impossible to even discuss this subject…because Buddhists would have such disagreements that it would be meaningless to classify them as Buddhists or that they have any cohesion of any kind.
This really be far more of a Buddhist problem than it is for anyone else because I’m not concerned with intricacies of interpretations of nirvana, samsara and karma…I’m just pointing out that these specific concepts are very much integral to Buddhism, as other concepts are to other religions.