Yes, it's the Quran-sanctioned licence to kill, which makes a sharp difference between islam on one hand from Judaism and Christianity on the other hand. Both Western monotheist religions simply ban killing. To kill a man is always a serious sin. Full stop.
Islam, however, speaks about a right to kill. A murder need not be just a sin; under certain circumstances it may be fully Quran-compliant.
In which other book have we read something strikingly similar?
Yes, it's the famous anti-totalitarian satire by George Orwell. Communism is long gone, but it hasn't been the only totalitarian ideology with the crazy ambition to rule the world.