NEWTON — More than 2,000 backers of Israel, including Governor Deval Patrick, attended a rally at a synagogue here Monday night to show support for the country amid its escalating military conflict with Hamas.

Under heavy security, rally attendees packed Congregation Mishkan Tefila, which was decorated with American and Israeli flags, as well as pro-Israel signs bearing slogans such as “We Stand With Israel” and “Israel Seeks Peace.”