The Noahic Covenant forbids the shedding of blood upon pain of shedding of blood:
The Covenant of the Rainbow
Genesis 9 v 1 And God blessed Noah and his sons, and said unto them, Be fruitful, and multiply, and replenish the earth. 2 And the fear of you and the dread of you shall be upon every beast of the earth, and upon every fowl of the air, upon all that moveth upon the earth, and upon all the fishes of the sea; into your hand are they delivered. 3 Every moving thing that liveth shall be meat for you; even as the green herb have I given you all things. 4 But flesh with the life thereof, which is the blood thereof, shall ye not eat. 5 And surely your blood of your lives will I require; at the hand of every beast will I require it, and at the hand of man; at the hand of every man’s brother will I require the life of man.
6Whoso sheddeth man’s blood, by man shall his blood be shed: for in the image of God made he man.
This covenant was made before the creation of the Israelite theocracy at a time when there were no laws of blasphemy or apostasy. This covenant that Jehovah made with Noah is an absolute prohibition of shedding of blood, killing or murder except by taking the blood of the shedder of blood himself as punishment and retribution. The blood of all others who have not shed any blood is then inviolate. Islam unlawfully and wrongly breaks this divine order of things by abrogating and replacing this covenant with a political covenant by which the shedding of the blood of those human beings outside the covenant is not forbidden and even encouraged by the instrument of Jihad:
Specific prohibition of killing the covenanted people.
Q.9, v.4. Excepted are those with whom you make a treaty among the polytheists, then they do not give you loss in everything, and not trample you over anything; so fulfill for them their treaty till their term. Indeed, Allah loves the unblemished ones.
Q.9, v.7. Hence, on whatever they are upright toward you, be upright also toward them. Indeed, Allah loves the unblemished ones.
Q.4, v.90. Except for those who take refuge with a group between yourselves and whom is a treaty, or those who come to ye their hearts strained at fighting ye or fighting their own people. And if Allah had willed, He could have given them a power over ye, and they would have fought ye. So if they keep detente on ye, and do not fight ye, and offer you the peace, then Allah has not made for ye a way against them.
Not forgetting that the Sword Verses of Surah 9 abrogate all verses that command defensive Jihad only.
Hence we have an unlawful political religion Islam which sets aside and tramples upon the sacred covenant which Jehovah made with Noah protecting the lives of all human beings made in his image, being all of equal worth in his eyes.