I've never heard of this punishment before, i.e. cutting the tongues of infidels. Is there any precedent?
Off with their tongues, salafis in egypt
....“Promotion of Virtue and Prevention of Vice” group ordered the cutting of the young man’s tongue as they claimed that he cursed Islam. “....
The incident is the latest in a series of events where extremist groups, mainly Salafis, have carried out attacks against Egyptian citizens to prevent them from carrying out what they say is the “vice,” prompting fears among human right activists and liberalists of the deteriorating status of personal freedoms.