Isi Leibler: J Street's outrageous new initiative - 'The time has arrived for liberal American Jews who support Israel to ask themselves whether there should be some limitations or red lines for organizations seeking to be part of what they describe as the "Jewish tent." Until now, many seem to be convinced that it is in the Jewish interest for all organizations to be brought into the Jewish fold irrespective of how much they malign the Jewish state. The most prominent example is J Street, which is publicly committed to lobbying the US government to force Israel to take actions contrary to the will not only of the democratically elected government, but the vast majority of the people. Many consider that tolerating such a group within the Jewish mainstream transforms the concept of a Jewish tent into a farce...'