The Afrikaners in their wars with the British and to protect Apartheid often quoted the Bible. Their favorite ethnic slur, Kaffir, was a direct loan from the Arabic Kuffar, meaning unbeliever. And the Jehovah's Witness practice of dismissing the faith of other Christians can be described in one Arabic loanword Takfīr.
Jehovah's Witnesses is just Islam without Muhammad, the Quran, Beards, or Swords. Beards and Swords might make Jehovah's Witnesses a little less gynocentric if you ask me.