Obviously true, because they see the reality of our spiritual and physical existence ONLY through the perspective of their own cultural perspective, and of course rejecting all others in one way or another.
Who said anything about rejection? Having a different paradigm does not mean you are rejecting something else. It just means acknowledging differences. We can all get along marvelously by acknowledging differences. Does living in Asia mean you REJECT north America? Obviously not.
Some of the ancient religions, especially the dharmic ones, and may indigenous ones held incredible wisdom, including tolerance.