[A staunch imperial might say that Rix commandos were never human, that they were their own breed - true enough, all of them creche-born in their ships, en route to missions every moment of their existences, without the trials of the unnecessary gender - that the disputed border between organic and synthetic was irrelevant, that they were alien creatures from the beginning.]

For a technical answer, only a Rix would know. Philosophically -

Well. A tight-knit tribe that uses violence to spread their beliefs? I don't think it matters particularly how durable the bodies they do it in. That's very human.