We have endowed Luqmãn with wisdom: "You shall be appreciative of GOD." Whoever is appreciative is appreciative for his own good. As for those who turn unappreciative, GOD is in no need, Praiseworthy.
Muhammad was no more than a messenger like the messengers before him. Should he die or get killed, would you turn back on your heels? Anyone who turns back on his heels, does not hurt GOD in the least. GOD rewards those who are appreciative.