
Judged according to https://en.wikipedia.org/wiki/Jewish_population_by_country
I'll go with the numbers in the table, assuming an equivalent still exists in 2030. I will ignore any section on "Debate over United States numbers" and just look at the bottom line (i.e. the table, assuming it exists).
@JonathanRay that is halfway correct. Not only do their ultra-orthodox members have more kids than their American counterparts, Israeli Secular jews have the highest birthrate of any secular group in the western world (or westernized country).
@JonathanRay this market can more or less be interpreted as "Will any event cause greater than >1 million israeli jews to die leave by 2030".
There is a huge fertility differential as you said, and also American Jews often outmarry and Israeli Jews generally don't.