They fool naive Jews into coming to their "Synagogue" which is really a church. These Jews think they are supporting a pro Israel group when it is in fact an anti Israel group. Just like you can't be Jewish and believe in Jesus as God (that makes you Christian by definition), you can't be Pro Israel and ask the US to boycott Israel's foreign minister . That makes you an ANTI-Israel lobby by definition.
Aden hotel used by Yemen goverment hit by grenade (Reuters)
from the article: J Street chief: Obama needs to connect with the Israeli people