Sacred Haven of Debauchery

That's also a questionable limitation.

It was actually quite amusing how it used to work with synthetics. If a synthetic became a spiritualist, it would receive a happiness penalty for legalizing AI and would yearn for its own destruction. They later fixed that, though.
Although, in Stellaris in general, the interaction between spiritualists and materialists is strange.

Added after 14 minutes
By the way, maybe we could create a thread where we can upload our Stellaris races? It's more fun when you encounter bizarre creations from someone you know, rather than those generated by the game.