Wikipedia
Omnism
Omnism is the recognition and respect of all religions; those who hold this belief are called omnists (or Omnists). The Oxford English Dictionary (OED) quotes as the term's earliest usage by English poet Philip J. Bailey: in 1839 "I am an omnist, and believe in all religions". In recent years, the term has been emerging anew, due to the interest of modern day self-described omnists who have rediscovered and begun to redefine the term. It can be thought of as syncretism taken to its logical extreme. However, it can also be seen as a way to accept the existence of various religions without believing in all that they profess to teach. Many omnists say that all religions contain truths, but that no one religion offers all that is truth.