We actually have precedence for just these kinds of Situations:So, was just rampantly speculating the other night when it occurred to me that certain actions taken against the members of a hive mind don't have nearly the moral implications they do when taken against a non-hive civilization.
Blow up a Hive colony with Terror Bombing? They shouldn't care about it beyond the fact that they're inconvenienced, and honestly - so long as only members of the Hive died - neither should anyone else. After all, you didn't kill a single civilian of their species - because there is no such thing.
T1 and T2 Robot pops. It is explicitly said they are "not sentient". There are explicitly overrides that allow you to always purge them - even if you have the AI accord and what not (actually getting them in that situation is another story).
The same way each drone is explicitly "not sentient". With even Autonomous Drones only being on the fence.
Or what about literall Pre-Sentient pops?
By lore and gameplay there is little difference between those 3 cases. There is a good argument for them being closer to pre-sentients* then Robots as far as purge penalties are concerned.
*They are pre-sentient in the sense that the right Genetic Engineering can make them sentient - removing the hivemind trait.
As for Hiveminds not being pised for you purging thier Drones? Nope. No mater how you slice it, if you cut of someones hand he will be properly pissed about that.
With the other empires (especially non-hive minds) we can talk about it. There is no way to not purge hive mind pops*, so there should be exceptions to the purge penalties in those cases. Otherwise attacking a hive mind just becomes unfeasible and Diplomatic Nightmare.
*I asume that is realised by a fixed setting of thier pops to "Undesireables". With you maybe still having the options to choose how to purge them.
Hiveminds can be both made and have vassals and all the other Diplomatic Options.Slavery is kind of moot because they won't survive outside the hive anyway, but that also makes purging basically irrelevant. They're already dying. I'm assuming right now that conquering their entire species causes them to waste away, but it would be amazing if you could effectively capture the hive locus, allowing you to have an entire hive as a single subject with many appendages within your empire.
If you want pops withot happiness, there is T1+T2 Robots and Nerve Stapling Ascension Genetics. Of course unlike the Hiveminds, none of them have decent science and power options.