And Baha'is are preaching to people that agree with them about the things written in the NT about Jesus. They never happened. They were made up. Original sin, Satan, hell, Jesus being God, God himself, walking on water... all of it gets eliminated, because it doesn't make sense. Yes, I can see that. Christianity made up all those things to get people to believe and follow their teachings and obey or risk being sent to hell and burn.
But then Baha'is have a different reason to not believe those stories. If all those things written are true, then their religion is false. Can't have that, so they invent a way to interpret those stories to make them not true, in a literal sense, that is to say they didn't really happen, but those stories were "symbolically" true. And they were a grand test to see if the followers of Jesus would believe him or the phony stories about him. That's incredibly wild. But Baha'is believe it.
Or it's whacked out interpretations and explanations of how the other religions are wrong that keep people from taking the Baha'i Faith seriously. Interpretations like these is why I don't believe the Baha'i concept of "progressive" revelation. To get Christianity into the progression, Baha'is make most every belief and doctrine of Christianity false.
No religion is false. I believe that one truth cannot contradict another truth so when we look at the interpretation which is not contradictory we find all religions are true. I never believed in Jesus so strongly as a Christian than I do as a Baha’i or Muhammad and the Quran. Or Buddha or Zoroaster. I treasure them all as I do my own faith.
Christianity itself teaches progressive revelation as it accepts all the Jewish Prophets and expects Christ to return. Same with Islam etc. There’s no need to reject Buddhism or Islam in order to accept Christ. We can accept each other’s religion as they all teach goodness and truth.