according to estimates there are about 1,500,000 christians in saudi arabia, almost all foreign workers. saudi arabia allows christians to enter the country as foreign workers for temporary work, but does not allow them to practice their faith openly. the percentage of saudi arabian citizens who are christians is officially zero, as saudi arabia forbids religious conversion from islam (apostasy) and punishes it by death. according to pew research center there are 390,000 hindus in saudi arabia, almost all foreign workers.