Let’s modify this question and ask as follows:
Is a religion that is not alien to human nature really foreign?
How a religion or a metaphysical/pagan/heathen system etc. that is alien to human nature can still be counted as “local” or “indigenous”?
Human nature contains certain universalities and particularities. And both are deeply sacred.
If a religion or way of life assists a man or a woman to achieve a perfect balance between the two then that system is in alignment with human nature.
On the contrary, if there is disequilibrium then howsoever local or native a tradition(s) is, it shall still be regarded as unfit and foreign to a folk.
Now, who defines the contours of human nature?
A philosopher? A scientist? A priest? or none of them?
Is Man [implied both sexes here] competent enough to define himself/herself as well?
If yes, then, how does he/she do that? Moreover, how does he/she know that that method is correct?
If no, then, where should we be looking to get the clearest picture of ourselves?