Joseph Puder writes that the number 70 has significant meaning in Jewish tradition.  It recalls the 70-year Babylonian Exile that led to the start of the 2nd Jewish Commonwealth in 530 BCE. Puder highlights similarities between the returnees from the Babylonian Exile and Israelis today.

https://www.frontpagemag.com/fpm/269879/israel-70-mature-and-prosperous-joseph-puder