This is happening in two countries separated by well over 1,000 miles of Indian Ocean - Burma and Sri Lanka. It is puzzling because neither country is facing an Islamist militant threat. Muslims in both places are a generally peaceable and small minority.
In Sri Lanka, the issue of halal slaughter has been a flashpoint. Led by monks, members of the Bodu Bala Sena - the Buddhist Brigade - hold rallies, call for direct action and the boycotting of Muslim businesses, and rail against the size of Muslim families.
While no Muslims have been killed in Sri Lanka, the Burmese situation is far more serious. Here the antagonism is spearheaded by the 969 group, led by a monk, Ashin Wirathu, who was jailed in 2003 for inciting religious hatred. Released in 2012, he has referred to himself bizarrely as "the Burmese Bin Laden".
March saw an outbreak of mob violence directed against Muslims in the town of Meiktila, in central Burma, which left at least 40 dead.