Really? Must be? Why? Please explain.
Is it possible all religions are just different manifestations of worship of the same god-force? Believers of one religion won't agree but I think from a truly neutral position one has to agree this is possible. If there is only one true religion then all faiths but one are false. If there is no god or basis for religion then all religions are false.
Thus the only fantasy world is that constructed by the members of those false faiths.
True, but determining the false faiths is the crux of the biscuit (to quote Frank Zappa)
Are the Buddhists the false faith?
Are the Mormons the false faith?
Are the Baha’i’s the false faith?
Are the Evolutionists the false faith?
So many questions, so few definitive answers.