Ha shows what I know! I thought it was appx 50/50 Muslim/Hindu with a bit of Tao.
I do know the non muzzies (Hindus) do not like what the muzzies do to the islands they take over.
The only Indonesian island I know of that remains mostly Hindu is Bali. There are bits and pieces all over, and if I’m not mistaken, Hinduism is expanding somewhat, Islam being pretty notional in many parts.