Just to be provocative then Joe.

At what point is any Catholic subjected to excommunication? The police officer who is aware of the possible consequence of arrest? The prosecuting attorney? The judge and jury? The governor? The technician? The doctor who pronounces time and cause? Any voter who uses their vote for a pro capital punishment politician?

Are there any Catholics in the armed forces?

How about the priests and their support who have been found guilty of abuse? Or the Vatican seniors who covered it up?

Excommunication sounds a weak response to a non believer but even then, I don't see it used much either as a response nor a deterrent?