killing none muslims for being none uslims is ordained in the Quran
Shirk is worse than Killing
Since Jihad involves killing and shedding the blood of men, Allah indicated that these men are committing disbelief in Allah, associating with Him (in the worship) and hindering from His path, and this is a much greater evil and more disastrous than killing. Abu Malik commented about what Allah said:
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(And Al-Fitnah is worse than killing.) Meaning what you (disbelievers) are committing is much worse than killing.” Abu Al-`Aliyah, Mujahid, Sa`id bin Jubayr, `Ikrimah, Al-Hasan, Qatadah, Ad-Dahhak and Ar-Rabi` bin Anas said that what Allah said:
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(And Al-Fitnah is worse than killing.) “Shirk (polytheism) is worse than killing.”