This is true. One of my in-laws' neighbor practice a religion not included in the official list of recognized religions, so he just register himself as a muslim

This is true. One of my in-laws' neighbor practice a religion not included in the official list of recognized religions, so he just register himself as a muslim instead. Ultimately, this field doesn't really matter though in day to day life, and might be removed entirely in the future. > Someone later explained that in Indonesia you legally had to tell the government what religion you followed, and "none" was not an option. While Indonesia is not a muslim country, believe in God is actually included in its foundational philosophy, and thus hammered into your head as part of your education since primary school. You can believe any god, but not believing any god is definitely strange here and many people would have trouble accepting that.