Nothing funny about it. The Bible is the basis of most Protestant/Bible churches. The Bible is the writings of Christian not the creation of Catholics.
The Old Testament was written by Jew, while the New Testament was written by Catholics; all being the Inspired Word of God. The Bible (all 73 books) was assembled and defined as The Bible by Catholics.
Protestants took The Bible with them when they left, and still use part of it, usually badly mistranslated or even embellished.
You said: The Bible is the writings of Christian...
I bet the Jews would surprised to learn that the OT writings were penned by Christians.