You should update/add your information source. There has been many non moslems, including Christian, become minister or governor or head of city/town all over Indonesia. Since its independence until now. In the beginning of current presidential period (2019-2024) there were 5 ministers as a Christian. However last year 1 is replaced due to unpopular take on COVID-19 handling and another 1 is sacked due to corruption on social programs during Jakarta’s lockdown last year. Even the governor you talked about is now becoming a commissioner for a state owned oil company. Imagine. someone out of jail, a Christian but hold a prestigious position in a state owned oil company.