Justifying the beheading done there is just evil. By Sharia if you're just an apostate or kafir paying jijiya who has done some miniscule mistake which might include affecting the feeling of an Imandar(i.e Muslims). Now anyone can be a kafir because the definition of being a muslim is extremely vague in Quran and hadiths, so that's why you see violence between shia, sunni, ahmediya and all others. Even different factions between Sunnis.
archagon|1 year ago