I don’t think they will garner enough support in Israel for a Giuliani victory in the primaries. There aren’t enough Jewish Republicans to push him over the top:

Former New York mayor Rudolph Giuliani already had presidential campaign organizations set up in all 50 US states; now he also has one in the State of Israel.

The thousands of eligible absentee voters in Israel could have a significant impact on who will win the Republican and Democratic nominations. Giuliani is running first in a close Republican race.

Giuliani Supporters in Israel is a grass-roots effort to mobilize the support of Israelis with US citizenship that was set up by Mordechai Twersky, a former Bronx, New York, communal leader and candidate for the New York State Assembly and the Knesset who was cited by Giuliani for his communal work.

Although the organization was not officially authorized by Giuliani, his campaign staff has already made contact with Twersky and endorsed his effort.

The Republicans and Democrats Abroad organizations have long been active here ahead of presidential elections but Twersky said this was the first time a campaign has been set up in Israel to help a candidate ahead of party primaries.

How many of those thousands are Republican and what states are they from? I don’t see this making a difference.
And then there’s this:

“On the Israel issue, it turns out to be a wash. Giuliani and top democratic candidates Hilary Clinton and Barack Obama are all strong supporters of Israel and I am sure the voters will see that as well.”

I don’t think that this guy is really thinking this through, if he did he would realize that it’s in Israel’s best interest for us to stay in Iraq and try to stabilize the region. Clinton and Obama want us out whether conditions on the ground have improved or not. How does that help Israel?