First amongst these is whether you believe Israel has a 'right to exist'.
Those who totally deny that 'right' have some explaining to do.

Second, whether you believe that being critical of Israel publicly, particularly
as a Jew, is better than making your views known more privately, within
the Jewish community, or to Israelis. In the UK, there is a present 'cause
celebre' with an organization called Independent Jewish Voices taking out
a large advertisement in the Guardian newspaper and in the Jewish
Chronicle, being very critical of Israel.

I am not part of that, as it reads too much as if they regard themselves as the 'good Jews' so that by implication the others are bad. But it is legitimate for them to do it- as
Jews- just as it is legitimate for others to be critical of them for doing it without them playing a wider role in the debate in the Jewish world.

We must have free and open debate, and that is a test of an open society.
What is not acceptable are the following:
-The view that we back Israel over everything, right or wrong.
-The view that it has no right to exist- it plainly does.
-The use of anti-Semitic stereotypes in criticism of Israel's policies.
-The unwillingness to recognize that the greatest criticism of Israel's
policies comes from within Israel, and that Israel has the only truly open
democracy in the Middle East.
-The idea that Israel has to adhere to standards above other countries. This is
only legitimate as a view if one believes it is wholly founded on Jewish
values, rather than as a nation-state like any other, which is the fact.

As a UK observer, and a Jew who has been deeply critical of some of
Israel's actions in the past, most notably Israel doing nothing to stop
the Phalange militia's massacres in the refugee camps of Sabra and Shatila
in 1982 (which caused a huge and passionate outcry in Israel too), I often
feel American Jews are too quick to cry 'anti-Semitism'.

It all depends on context, and the best thing we can all do for Israel's long-term future is
support the good things it does, and that exist and are developed within
Israel, and criticize, or not support, the bad things.

Anything that has Jews and Muslims, Arabs and Israelis, working, studying, learning,
laughing together is, in my view, worthy of support.