If you ever doubted that terrorist Muslims were bad Muslims:
The BBC, among others, is reporting: "S Koreans told 'convert or die'", and that the South Korean hostages were beaten and threatened with having their heads blown off if they did not convert.
Of course, their captors seem to have forgotten the general rule that forced conversion is not legitimate, based on the Qur'anic statement:
Let there be no compulsion in religion: (Surah 2:226)
Which is not to say that forced conversion has never taken place; like all proselytizing religions, like all religions that have held great political power, Islam is not immune to corruption and thus has been forced upon people in the past. Nevertheless, conversion requires that one state and believe the Islamic creed (the shahadah), and as such merely saying it is not sufficient. Good thing, too, or countless World Religion profs would have inadvertently converted over the years.
Long story short: being a good Muslim and a terrorist are incompatible, mutually exclusive, even. While Muslims, like Christians, may fight for certain causes, neither religion gives carte blanche for this kind of perversion, and Muslims the world over are done a disservice by these crackpots misusing their faith.