“It doesn't matter, either Hindu religion or Christian religion or Mohammedan religion, anything you like. But we have to test. Just like a student who has passed M.A. examination. Nobody inquires, "From which college you have passed your examination? You have passed M.A. examination? That's all right." And we are concerned, whether you are graduate, postgraduate. That's all. Nobody inquires, "From which college, from which country, from which religion, you have passed your M.A. examination?" No. Similarly, nobody should inquire, "To which religion you belong?" One must see whether he has learned this art, how to love God. That's all. That is religion”
Excerpt From: His Divine Grace A. C. Bhaktivedanta Swami Prabhupada.
"Satisfying The Senses"
73/08/15 London, Bhagavad-gita 2.9