Among the most striking differences between the Jewish movements in the 21st century is their response to pressures of assimilation, such as intermarriage between Jews and non-Jews. Reform and Reconstructionist rabbis have been most accepting of intermarried couples, with some rabbis willing to officiate in mixed religious ceremonies, although most insist that children in such families be raised strictly Jewish. Conservative rabbis are not permitted to officiate in such marriages, but are supportive of couples when the non-Jewish partner wishes to convert to Judaism and raise children as Jewish.