Don't forget other classical signs like giving up your previous identity (taking on an Islamic name) when joining the cult, severing ties with non-cult members ("do not take the unbelievers as friends") denying them some form of critical analysis, instead and relying on the support network of the cult, paying it part of your earnings (zakat), leading it's followers into destructive and antisocial behavior, the deception used in the recruitment process by not clearly identifying their purpose, the sexual exploitation of it's female members, using "coercive persuasion" over "normal" persuasion,and ultimately, what they would like do to those why try and leave.
Do we undertake to deprogram and entire culture or is their some other solution?
Deporting them is only a partial solution because Israel is still threatened and soon Islamic countries will have nuclear missles.