Dershowitz's charges were summarized in the headline, "J Street’s 'Big Tent’ is open only to one side - the anti-Israel and BDS-supporting hard left of its own position; pro-Israel centrists are censored" Ben-Ami did not respond at all to those charges. He ignored them in his article. Ben-Ami is right in that the situation is serious, but that is all the more reason to deal with the truth and not attempt to persuade by ignoring points that he does not wish to address.
NATO backs Turkey's fight against ISIS (Reuters)
from the article: J Street's challenge to the U.S.-Jewish right: Focus on peace