If we are looking at this from a Bahai perspective, the Scripture from each of those religions is not someone's thoughts, like an opinion piece.
The only thing that the Bahai Faith questions is if any of the Scripture from the very very ancient religions has been distorted or lost due to human intervention.
In fact, all religions have had this challenge to varying extents.
Baha'u'llah prevented this by putting His seal on each of His revealed Tablets, after they were transcribed by His transcription Apostles.
