Islam is not a person, not an association. I mistrust anyone speaking in name of a collective, especially in name of God or a religion.
I'd you want to read Koran to get a more informed opinion this is an easy to understand chronological Translation:
https://libgen.is/search.php?req=Chronological+Modern+English+&lg_topic=libgen&open=0&view=simple&res=25&phrase=1&column=def
خيبر خيبر يايهود جيش محمد سوف يعود
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What?
Mohammed is dead, he cannot return
The translation is pretty horrible
It's his army that will supposedly return...