You probably didn't mean that: the difference between fact and fiction doesn't depend on anyone's senses and beliefs, but on what the world is as a whole.
What we think is fact or fiction will depend on our senses and beliefs.
Basically, even a genuine belief in in unicorns and pixie dust don't make those a fact. It's fiction, the believer just doesn't know it.
As for religion and secularity… well, either there is a God, or there isn't. If there is, secularity won't make it go away. If there isn't, religion won't make it true.