There is nothing in their mission statement or their policy positions to indicate that it is any thing but Pro-Israel. It is openly and loudly promoting peace between the State of Israel and the Palestinians--the two state solution--supported by Bush Adminstration and the previous Israel Adminstration under Olmert and Livni. If being pro-peace makes an organization anti-Israeli, is the real question?
Islamic State militants blow up ancient Arch of Triumph in Palmyra (Reuters)
from the article: Sure, J Street is pro-peace - but is it pro-Israel?