Jerusalem is never called Babylon in scriptures. Sodom, yes. Egypt, yes.
“Jerusalem is never called Babylon in scriptures.”
Not directly, but definitely indirectly. There’s are many cities on seven hills, but only one of them is described as responsible for the blood of all the prophets, indeed described as such by Jesus himself. Mystery Babylon is also described as responsible for the blood of all the prophets. No other city fits this criteria (and a few others as well).