The Islam page on RationalWiki seems to be in a state where it's simultaneously edited by people who have a pro-Islam bias and people who have an anti-Islam bias. It's current form has a section entitled "Muslims apologetic obfuscation", and quotes the Qur'an:
Because of that, We decreed upon the Children of Israel that whoever kills a soul unless for a soul or for corruption [done] in the land - it is as if he had slain mankind entirely. And whoever saves one - it is as if he had saved mankind entirely. And our messengers had certainly come to them with clear proofs. Then indeed many of them, [even] after that, throughout the land, were transgressors.
RationalWiki then writes:
So [the] Qur'an is referring to a verse in Jewish scripture, which is not the same as ordaining something to Muslims.
My opinion is that this is an obtuse interpretation, but let's give this some consideration.
Question: Is there a concrete reason that Qur'an 5:32 applies to modern-day Muslims, and not only to the "Children of Israel"?
I've read various news articles quoting scholars quote this ayah as applying to all Muslims (perhaps after some terrorist atrocity). I'm also aware that there's other verses that prohibit specific kinds of murder (4:93 and 6:151).