historically speaking, as tools for imperialism and expansion and slavery and colonialism, christianity and islam have really always been pretty much exactly the same thing.
they copied each other, relentlessly.
the idea of jihad, for example, was invented by a roman emperor, heraclius, to rescue the "true cross" and restore it to jerusalem. the muslims then stole that idea, flat out, and used it to further their own interests.
on the other hand, the papal bull that authorized christians to enslave pagans and 'saracens' and set off the period of european colonialism was modelled after the muslim practice of enslaving non-muslims, and was something the christian world hadn't really done, previously. in fact, the english word for slave is etymologically derived from the english word for russian - slav. and, we know the russians were both white and christian, at least in the period of time since william the conqueror.
so, how can we talk about decolonization without including dearabization along with implied dechristianization?
i'm not blaming anything or anyone besides an incomplete understanding of history, which is so often the problem on the left.