Check out the CIA World factbook. https://www.cia.gov/library/publications/the-world-factbook/rankorder/2102rank.html Israel is no 18 in the World in Life expectancy while America in no 51. Moreover, the trend in recent years has been for Israel to move up in this table while US has been declining. Of course, this analysis ignores the safety of "Jews remaining Jews" - as opposed to assimilation and outmarriage.
Firebomb thrown during demonstration in northern Israeli town of Umm al Fahm (Haaretz)
from the article: American Jews are giving up on Israel