According to Jewish law: If you mom is Jewish you are Jewish, even if you dont practice the Jewish religion/practice a different religion(that's why it has an ethnic aspect to it)
Judaism is an orthopractic religion, which means certain deeds/actions speak louder than someone's belief (in J.C. for example). That is why, while many Jews can be athesit, they will still celebrate holidays like Hannukah, Passover, Rosh Hashana etc...cause they are fun and have also become part of the culture.
If you want to become Jewish, you need to undergo orthodox conversion, and keep all the Jewish laws as described in the Jewish holy book, the Torah.
Not all Jews are Israelis, and not all Israelis are Jews. Nevertheless, Jews can become Israeli citizens very easily.
"The Jews control Hollywood!"
"The Jews caused 9/11!"
"The Jews oppress the Palestinians!"
"The Jews ran over my poodle!"
A Jew is a person who's mother is Jewish. (Some streams of Judaism argue that Jewish patrimony can be acquired through the father as well).
Jews are not a race but an eclectic mix of different races, nationalities, and cultures; they are a truly multi-cultural and multi-ethnic people. However, within this mix, there are distinct ethnic groups such as the Ashkenazic and Sephardic Jews that make up the overwhelming majority of the Jewish People.
Most American Jews are of Ashkenazic origin -- usually originating from Eastern Europe or the former Soviet Union. Therefore, American Jews could largely be classified as an ethnic group, hence the characteristic stereotypes, although there are exceptions.
A Jew is not a person who practices Judaism, although most Jews do adhere to some form of Jewish practice or cultural tradition.
A Jew is not an Israeli and an Israeli is not a Jew. An Israeli is a citizen of the state of Israel. While most Israeli's are Jewish, there are also non-Jewish citizens of Israel.
A Jew is not automatically a citizen of the state of Israel. A Jew must apply for and be granted citizenship to the state just like everyone else, although most are awarded citizenship rather easily.
Larry King is not an Israeli citizen.
2) is also a culture/ethnicity, that is to say it has a certain sense of humour, certain type of food and music etc.
3) A person who Mel Gibson talks smack about after he has had too much to drink.