Origins of Judaism
For centuries, the traditional understanding has been that Judaism came before Christianity and that Christianity separated from Judaism some time after the destruction of the Second Temple in 70 CE. Starting in the latter half of the 20th century, some scholars have begun to argue that the historical picture is quite a bit more complicated than that. In the 1st century, many Jewish sects existed in competition with each other, see Second Temple Judaism. The sects which eventually became Rabbinic Judaism and Early Christianity were but two of these. Some scholars have begun to propose a model which envisions a twin birth of Christianity and Judaism rather than a separation of the former from the latter. For example, Robert Goldenberg (2002) asserts that it is increasingly accepted among scholars that "at the end of the 1st century CE there were not yet two separate religions called "Judaism" and "Christianity"".
Daniel Boyarin (2002) proposes a revised understanding of the interactions between nascent Christianity and nascent Rabbinical Judaism in Late Antiquity which views the two religions as intensely and complexly intertwined throughout this period.
Religion in Israel
Conservative Judaism and Reform Judaism are represented among Israeli Jews. According to The Israel Democracy Institute, as of 2013, approximately 8 percent of Israel’s Jewish population "identified" with Reform and Conservative Judaism, a study by Pew Research Center showed 5% did, while a Midgam survey showed that one third "especially identified with Progressive Judaism", almost as many as those who especially identify with Orthodox Judaism. The Chief Rabbinate strongly opposes the Reform and Conservative movements, saying they are "uprooting Judaism", that they cause assimilation and that they have “no connection” to authentic Judaism. The chief rabbinate's view does not reflect the majority viewpoint of Israeli Jews, however. A survey of Israeli Jews published in May 2016 showed that 72 percent of respondents said they disagreed with the Haredi assertions that Reform Jews are not really Jewish. The survey also showed that a third of Israeli Jews "identify" with progressive (Reform or Conservative) Judaism and almost two thirds agree that Reform Judaism should have equal rights in Israel with Orthodox Judaism. The report was organized by the Israel Movement for Reform and Progressive Judaism ahead of its 52nd biennial conference.