An Indifferentism

1. (religion) The doctrine that all religions are equally valid.
2. (more broadly) Relativism, agnosticism; apathy, indifference.
3. (countable) An expression of such a doctrine or view.
4. (philosophy) The doctrine of absolute identity, i.e. that to be in thought and to exist are one and the same thing.

     in the Catholic faith

is the belief held by some that no one religion or philosophy is superior to another. The Catholic Church ascribes indifferentism to many atheistic, materialistic, pantheistic, and agnostic philosophies. There are three basic types of indifferentism described by Catholic apologetics: absolute, restricted, and liberal or latitudinarian indifferentism. Indifferentism was first explicitly identified and opposed by Pope Gregory XVI, in his encyclical Mirari vos