 Jewish organizations and the Supreme Court of Israel have rejected this claim in cases related to the Law of Return, and instead consider Messianic Judaism to be a form of Christianity.From 2003 to 2007, the movement grew from 150 Messianic houses of worship in the United States to as many as 438, with over 100 in Israel and more worldwide; congregations are often affiliated with larger Messianic organizations or alliances., population estimates for the United States were between 175,000 and 250,000 members, between 10,000 and 20,000 members for Israel, and an estimated total worldwide membership of 350,000.