It is a mistake that most Christian schools only expose their students to Christian theology. Personally, Christianity did not make sense until I had greater knowledge of Eastern Religions, particularly Buddhism.
I understand why they avoid teaching about other religions, for fear of leading the flock astray, but a broader religious understanding provides important context that, in my experience, strengthens one’s faith. 
1) What
Christianity makes sense without any other religious narrative. It's context is the easily discernable human situation. It tells us how we got here, why we are the way we are, and what the solution to that problem is. It's helpful to know the other dogmas in order to understand other people, but one only needs to hear God's voice in the means of grace to understand the truth.
Fr.
Christianity and Buddhism are "cousins on their mothers' side" via Neoplatonism's cultural and intellectual influence on both religions' early development.
Ashoka was Buddhism's "Saint Paul", and he was part-European himself, fluent in Koine Greek, and a popular patron of European and Middle-Eastern philosophers and theologians.
It would be more surprising if they did not share common concepts and principles.
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The Abrahamic religions are a major part of the problem; they are not a solution.
