This comment will surely be deleted:

The Shahada is the Islamic oath of allegiance to Allah and Muhammad: "There is one god. Allah is god. Muhammad is the prophet of god". Every Muslim is required to say it in prayer sessions five times a day.  It is the white text on the black flag of ISIS. 

That simple oath is all that is needed to convert to Islam. Across the ME people are executed if they can't or won't recite the shahada. Millions of Christians through history have been beheaded, hanged and burned alive by Muslims if they refuse to renounce Jesus and take up the Koran.   Whatever Torquemada did, pales in comparison to the oceans of blood shed for Islam.  Obviously, Muslims don’t want us to talk about it and call us Islamophobic if we do. Google ‘TAQIYYA”.