More compact Indonesia?

With a pod after 1900, make it so that Indonesia includes the rest of the muslim and other parts but excludes islands to the east.

I am imagining an Indonesia thats limited to the Malay pensula, Sumutra, Java, Borneo, Sulawesi, Bali and a few other small islands. This would mean it gains otl Malaysia, Brunei and Singapore, but looses west papua and much of the Moluccas.

Maybe before independence, Timor, Papua and the other Christian islands become united as a separate state or remain under Dutch control?

Insular-Southeast-Asia-Religion-Map.png
 
There was a brief communist rebellion on Java in 1948, which the nascent Indonesian Republic suppressed. If conflict could be avoided between the government and communists, and instead the two establish common ground, the US would be much less sympathetic to Indonesia, and might support the Republic of South Maluku and would oppose Indonesian annexation of West New Guinea.
 
There was a brief communist rebellion on Java in 1948, which the nascent Indonesian Republic suppressed. If conflict could be avoided between the government and communists, and instead the two establish common ground, the US would be much less sympathetic to Indonesia, and might support the Republic of South Maluku and would oppose Indonesian annexation of West New Guinea.
How strong was this republic?
 
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