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1.
The one true god is the only god that truly exists. All others are false.

Currently 137 religions claim to worship the "one true god".

Different sects of one religion will argue that they are the only ones who worship the "one true god"

Discussion of the trueness of one's god often leads to violence
Protestants vs. Catholics vs. Jews vs. everyone else for the last thousand years or more fighting each other on behalf of THEIR one true god...
by Sir Henry October 02, 2005