The fathers of 44% of Israel were born in Israel, as of 2015. I doubt they have dual citizenship, just as most Americans don’t have dual citizenship to their grandparents and great grandparents countries of origin.
Also, most Mizrahim and Sephardim these days are living in Israel, similarly to how most Ashkenazim are in the US. Even if an Israeli somehow has e.g. Iraqi, Iranian or Yemeni citizenship, moving back probably isn’t a safe idea. Morocco is probably safer, though.
After the fall of the USSR, there was also a huge wave of Russian emigration to Israel. Given conscription for the war in Ukraine, moving back now might not be the best idea.
If you’re rigging an election, it can be better politically to give yourself 65% of the vote than 97% of the vote.
97% is obviously fake. 65% is easier to make people beleive in.