There's no such thing as evangelistic dating.
"You're not going to get them saved by marrying them or dating them...(Be ye not unequally yoked together with unbelievers - 2 Corinthians 6:4)...understand, there is no evangelistic dating. They must be born again and love the Lord, or you should not be in relationship with that person" - W.L. Cati (Islam Rising)
Of course, this does not mean divorces for those who are too late. As Christians, our last resort is always prayer, not rebellion.
Nonetheless, the most wicked in all this show, is neither the believer nor the unbeliever, but those who hold moderate view thinking they are the best of all ideology, having no part in any friction of conflicts, yet seemingly fitting into all sides and parties.
I will not however cast stones upon these serpents, but like Paul, will pass them to Satan, that they may still have to opportunity to turn back.
In Cati's testimony, it's more like a Christian living in oblivion (kudos to her church on Christian education), got pulled into Islam, and got woken up by God in all those chaos, into salvation, regardless of whatever hocus pocus her Ameristian church was selling prior to all this.