Like Star Trek, they make religious people nuts, completely unsympathetic, and ironically make the tolerance of such obvious nuts crazy as well.
The writers should have made the parents less fanatical and more likable. They can obviously write gray characters, as most of the ambassadors are, but the religious bias in this episode was overpowering. In an earlier episode, it was telling to see the first Earth "religion" that Sinclair introduced to the aliens as "atheist."
I'd hoped B5 would be less lefty than Star Trek, and it is, but it still leans that way, and is getting just as preachy.