As for those who are agitating you, I wish they would proceed to emasculate themselves!
WEB
I wish that those who disturb you would cut themselves off.
YLT
O that even they would cut themselves off who are unsettling you!
F.O.G Original
(12) I want those troubling you to cut themselves off!
F.O.G
(12) I want those troubling you to cut themselves off!
F.O.G MSG
¹²I wish those troublemakers who keep pushing circumcision would go ahead and castrate themselves!ᶜ
Footnotes:
¹²ᶜ Castrate themselves: Paul uses shocking language to express his frustration with those promoting circumcision—if cutting is so important to them, let them go all the way with it.