And this is why so many people feel justified in calling "Darwinianism" (and evolution generally) a religion. It's too late to deny that Darwinianism is a religion. Too many people have uttered too many philosophical and religious conclusions and value-judgments based on Darwinian thought, to now deny that it has become a philosophy, indeed, a religion.
Then let me repeat; Many, including major religious authorities do not hold that evolution is incompatible with Christianity and does not undermine Church authority. To take your argument to its conclusion would be to assert that the Catholic Church's acceptance of Theistic Evolution is the endorsement of a different religion. That is absurd.