All beliefs written by men could be false.
We all pick and choose from history what suits our emotions ... and if we are not careful ... we can stuck in a certain idea that somebody or other actually told absolute truth.
They could..., but there may be many beliefs, which are not false, and a few which may be true.
The point is, I think God appreciates it, when a person discerns Truth amidst all the garbage out there, and rewards them with prudence and wisdom....Regretably there is a lot of trial and error in obtaining that reward. It does not seem to be hard-wired into the human condition.