I'm sure the half that are women that must wear the burqa or get acid in their face are free to practice their faith too..... as well as those who decide to leave Islam and subsequently take part in an honor killing (as the victim, anyway) would completely agree with you.
That is, if both these groups could talk freely.
But let's just leave those two groups out of this discussion, shall we?
Now I guess we're down to half a billion?