I will warn you that govern their nations.
The attitude should be taken with these nationals, Americans, Europeans, Brasiliano and other citizens to leave their country, willingly fight for any current or future terrorist group, should receive this treatment:
1- Have your withdrawal nationality and become stateless.
2 Declared persona non grata in any UN signatory nation or country that rejects terror as a form of government or politics.
3- unable to return to their parents forever.
4- to return to their country of origin, apply the self-defense of a third party, by reason of imminent danger.
"He who knows to do good and doeth it not...