The “lion’s share” of persecution faced by Christians arises in countries where Islam is the dominant faith, the report says, quoting estimates that between a half and two-thirds of Christians in the Middle East have left the region or been killed in the past century.

“There is now a serious risk that Christianity will disappear from its biblical heartlands,” it claims.

The report shows that “Muslim-majority” states make up 12 of the 20 countries judged to be “unfree” on the grounds of religious tolerance by Freedom House, the human rights think tank.

It catalogues hundreds of attacks on Christians by religious fanatics over recent years, focusing on seven countries: Egypt, Iraq, Pakistan, Nigeria, India, Burma and China.