In fact, many religions cannot be true or lead to the same truth at the same time. There is only one true religion that God revealed to people.
Each religion nowadays has its own beliefs and legislations. God wouldn’t confuse people by sending too many contradicting beliefs where -by logic- only one of them should be compatible to reality.
However, many religions could be originally the same before being exposed to different forms of corruption.
To Sum up, many religions could be originally the same, but not two coincident contradicting religions could lead to the same reality at the same time.