So then you would say the "Abrahamic religions" are all fictional(?)
The religions are real enough, with a significant proviso.
There is at least one of the three best-known Abrahamics that goes out of its way in order to fail my personal criteria for actually being a religion, so I prefer to call it a creed instead. Even then, that is an actual, real, existing creed. It is not fictional in the same sense that some D&D belief would be.
Whether Abraham and others correspond to actual living people in some degree or ever did is something else entirely, and would require more evidence than I feel that I have found.
I have no problem whatsoever with real, valid, worthy religions that happen to refer to fully fictional people. If anything, I may well prefer those.
Apparently mine is not a very popular and perhaps also not a very welcome stance from a typical Abrahamic perspective. I don't really understand why. But it is not for me to tell how any Abrahamic creed or religion should feel about my criteria.