The thing Decolonization theory forgot...

Decolonization added the idea that the Europeans had oppressed other peoples and were guilty of crimes they now had to redeem. There was no mention of how, throughout history, recruits to Islam had colonized the great Christian Byzantine Empire, Greece, Sicily, Corsica, North Africa and the Middle East, most of the Balkans and eastern Europe, Hungary, northern Cyprus and Spain.

Oh here is some other history.

About Indonesia they forgot the Molouks. A majority Christian Island group promised a nation state by the Dutch.