So we're talking, sword being held to my neck convert-or-die? Cuz in that case I think most people would say anything to keep their life.
If I was in that situation I'd be coming up with some real filth (I have a "potty mouth") in the hopes that I could get them real mad, and at least make my last few moments quite funny.
In Islam, we are all born as muslims, some just stray from the path. You "revert" to islam rather than convert, if that makes sense. That's their belief anyway.