Why is building of temples and churches and the propagation of any religion other than Islam not allowed in Islamic countries like Saudi Arabia?
Example of selecting a Maths teacher: Suppose you are a principal of a school and you have to select a Mathematics teacher. It is obvious that you will interview the candidates. If one teacher says that 2 + 2 = 3, the other says 2 + 2 = 4 and the third says 2 + 2 = 5 whom will you select? Since you know mathematics is logical, you will never select or allow a person to teach mathematics who doesnt even know the basics of arithmetic that 2 + 2 = 4. Where religion is concerned Muslims are experts: Similarly in the field of religion, Muslims are the best and Quran clearly mentions in Surah Ale Imran, Chapter 3, verse 19 (3:19): The Religion before Allah is Islam (submission to His will). [Al-Quran 3:19] It is further mentioned In Surah Ale Imran Chapter 3, verse 85 (3:85) If anyone desires a religion other than Islam (submission to Allah), never will it be accepted of him; and in the Hereafter he will be in the ranks of those who have lost (All spiritual good). [Al-Quran 3:85] No other re