Arabia wasn't even unified in any way before Islam, it was just a bunch of people speaking different languages stuck on the same peninsula, so how could it become a super power if it wasn't even a thing?
I mean, it was unified only for a short while after Islam, but what Islam did was cultural and linguistic unification of Arabia and arabization of neighbouring regions like Levant, Egypt and Maghreb
And what's important is that different Arabian states were already great regional powers in our timeline and imo Oman at some point could be even considered a world power
The other thing is that without Islam and Caliphate Sassanids wouldn't get btfo, so it's very likely that Iran/Persia would just conquer most of the peninsula sooner or later
Islam as a religion is shit, but that doesn't mean if it wasn't a thing Arabia would become a superpower
The statement is ridiculous, there are too many variables you'd have to consider and religion is just one of them
Arabia as a whole could do better without Islam, but it's just as probable if not more that it would actually do worse
Erasing Islam from the history creates a massive butterfly effect and it's really hard to predict how the world would look now after 1,5k of years
