Making up 16% of the population, Muslims constitute Israel's largest religious minority. About 2% of the population is Christian and 1.5% is Druze. The Christian population primarily comprises Arab Christians, but also includes post-Soviet immigrants, the foreign laborers of multinational origins, and followers of Messianic Judaism, considered by most Christians and Jews to be a form of Christianity. Members of many other religious groups, including Buddhists and Hindus, maintain a presence in Israel, albeit in small numbers. Out of more than one million immigrants from the former Soviet Union in Israel, about 300,000 are considered not Jewish by the Orthodox rabbinate.