I was asked by a friend once as to why non-muslims are not allowed preach in muslim countries. Atleast in Afghanistan, we have seen instances of people accused of preaching christianity kidnapped, killed or face death threat. Atleast one poster here thinks that Islamic Sharia makes punishable by death. What are the references in Quran that say this? If non-muslims can be killed for preaching in Islamic state, then it would be ok if non-muslim states start imprisoning and executing muslim for Tableegh. Without Tableegh, how will the message of Islam be able to reach non-muslims (Other than fighting war and subjugation)?