I want to remind them of this Canon Law, which applies to all Catholics
1983 edition. I suggest prayer and fasting, as well as asking help from friends in the Church before leaving.
PENALTIES FOR INDIVIDUAL DELICTS
DELICTS AGAINST RELIGION AND THE UNITY OF THE CHURCH (Cann. 1364 - 1369)
Can. 1364 §1. Without prejudice to the prescript of ⇒ can. 194, §1, n. 2, an apostate from the faith, a heretic, or a schismatic incurs a latae sententiae excommunication; in addition, a cleric can be punishedwith the penalties mentioned in ⇒ can. 1336, §1, nn. 1, 2, and 3.
§2. If contumacy of long duration or the gravity of scandal demands it, other penalties can be added, including dismissal from the clerical state.
Can. 1365 A person guilty of prohibited participation in sacred rites (communicatio in sacris) is to be punished with a just penalty.
Can. 1366 Parents or those who take the place of parents who hand offer their children to be baptized or educated in a non Catholic religion are to be punished with a censure or other just penalty.