few days back I saw in the gulf times that 55 Vietnamese converted to Islam. I was a big news. I don't believe these people keep their new faith once they go out of the country. It seems Islam is encouraging more people to join the faith without the right teaching. Of course Christians too. As far as I know the people joining Christianity ( one who starts believe Jesus as the Son of God, not just a Christian by name or tradition) will keep their faith till the end.

Believe everything, Trust nothing . . .