Israeli citizenship is designed very differently from the American model. Here, if you are born in the country or become an American citizen, you retain your citizenship unless you seek to renounce it. U.S. citizenship is not conditioned on ethnic or religious origin, and every citizen has the same rights and responsibilities.
Most of the world's nations use
jus sanguinis (as opposed to
jus soli) as a model for citizenship, including the US which uses a combination of both. This model grants citizenship by virtue of the parent's nationality -- thus the child of an American citizen gains the privilege of American citizenship (
jus sanguinis). Those born in the US are also granted the privilege of American citizenship, regardless of the parent's nationality (
jus soli)
Israel, like nearly every nation in Europe, uses ONLY
jus sanguinis -- citizenship is passed from parent to child. This applies to ALL citizens and citizenships equally and is not "conditioned on ethnic or religious origin".
In addition, Israel has created a system whereby the Jewish people are essentially considered to be citizens of Israel.
There are many other nations which use ethnicity or cultural origins as an expedited pathway to citizenship in varying degrees, including Croatia, Greece, Ireland, Rwanda, Serbia, Turkey, Spain, South Korea.