If it's not ok to use Master/Slave, or the imagery of a noose, why is it ok to use "crux?"
https://www.etymonline.com/search?q=crux
> Century Dictionary ascribes it to "the cross as an instrument of torture; hence anything that puzzles or vexes in a high degree ...." Extended sense of "central point" is attested by 1888.
So I guess you'd be find with calling your product "noose" or "lynching". Good luck with that.
What kind of a sinful name is Crossfit! Burn them at the cross!
And let'sorganize a protest in front of the Center for Research in Open Source Software (CROSS) at UC Santa Cruz(!!!!!) too!
Just because Crux's root was a torture device doesn't mean it has any connotation to a torture device in modern English.