and figures that don't back it up in the short term:
Haim Korsia, 51, who was elected Chief Rabbi of France last Sunday, will preside over a shrinking Jewish community. From a Jewish population of 500,000 or so - the largest Jewish community in the European Union - it may quickly fall to 400,000, or even less.
According to Natan Sharansky, the Jewish Agency Chairman, 2,254 French Jews completed aliyah during the first five months of 2014, against only 580 last year; a staggering 289 per cent increase. By December 31 this year, the total may be well over 5,000. Not since the Second World War has a Western country provided Israel with such immigration rates.
Moreover, a second group of French Jews is engaging in "gradual, informal immigration" - without applying for citizenship, they buy apartments in Israel, register their children at Israeli universities, commute between France and Israel for business, or come as "frequent visitors" on retiring.
"At the end of the day, many of them are likely to stay as fully fledged immigrants", a French-Israeli sociologist said. Actual French immigration to Israel may thus be closer to 6,000 or 7,000 a year.
http://www.thejc.com/comment-and-debate/analysis/120070/in-some-synagogues-here-whole-benches-are-suddenly-empty
Obviously it would take many years, even at 7,000 a year, for over 100,000 to leave. Even adding in emigration to the rest of the EU, or elsewhere, to say over 100,000 are leaving in 18 months is ridiculous.