The problem with that opinion is it's not hard based on fact, the families that fled often ended up in Europe. StillSome of which were later displaced again by pograms in Europe.
It's literally in the history of Zionism written by avowed Zionists. You might as well argue with water about how wet it may or may not be.
Modern Zionism ie the Zionism of the Israeli government is not based on Roman pograms though I'm sure some could indeed trace back that far. That said even making your argument proves my point further.