There is only one solution left: Make practicing islam illegal, destroy ALL copies hard and soft of the koran and incinerate all mosques, mecca and any other “holy” place they crowd to.
Lock any adherents up on an island with no escape. islam and the evil it portrays and practices will then fade away like Nazism.
Send the Shariah-lovers back to the desert, provide them with camels, swords, clothing, and animal skin water containers, and dig a few wells, all at Saudi expense. Underage harem concubines not included.
You really think you can incarcerate 1.6 BILLION people?