universal truths are not necessarily shared dogma. It is universal truth to a Christian that Jesus Christ is God. It is not a shared dogma of either Jews or Moslems who believe JC was at best only a prophet or teacher. Once we delete out all the unshared dogma we might find that we are left with common sense decency or virtue, if you will. (or Uncommon sense since good sense is not very common). Every religion you can name is replete with "particularist dogma" as you call it. That is the VERY thing that makes them a separate and distinct religion! Far from peeling it away, each religion creates its own worldview with its own version of saviors, saints, demons and devils.