Christians who attacked Muhammad or apostatized from Islam were executed under early Muslim rule

Evidence

Some Christians deliberately overstepped those boundaries and were put to death for doing so. A handful of Christians became martyrs either for attacking Muhammad and the Koran or for converting from Islam to Christianity (which, as apostasy, was a crime punishable by death). — John V. Tolan, Saracens, 362

Categorization

• SEED: Angle: the genealogy of ‘blasphemy law’ and apostasy punishment — how medieval Christian persecution narratives prefigure the modern Rushdie/Charlie Hebdo boundary disputes.