Columbia subject headings:
Christianity and other religions--21st century.
Christians--Arab countries.
Islam--Relations--Christianity--21st century.
Harvard subject headings:
Christianity and other religions--Islam--History--21st century.
Christians--Arab countries.
Islam--Relations--Christianity--History--21st century.
Princeton subject headings:
Christianity and other religions--21st century.
Christians--Arab countries.
Islam--Relations--Christianity--21st century.