Like every year there was also last December some debate about Christmas in Indonesia, especially related to the public space of the capital and large towns where big shops, restaurants, offices are decorated in 'Christmas style'.
14 December 2016 the Majelis Ulama Indonesia or MUI issued a fatwa forbidding Muslim to spread Christmas decorations, to produce or sell these things. It wass labelled Hukum menggunakan atribut keagamaan non-Muslim or 'A judgment about the use of religious attributes of a non-Muslim origin'. the fatwa used 6 verses of the Qur'an. Quite often the word kafir was used and general statement was that Muslim should not imitate the unbelievers or kafirun.
In the argumentation the MUI often uses the term kafir as if Christians are simply unbelievers, while the status of Christians in the Qur'an described also as 'people of the book' as followers of the prophet Isa son of Mary.