I am humbled by the presence of such great Talmidei Chachomim here in the CR who know all of Tanach, Shas and their meforshim, and who therefore know that what is written in those pamphlets has no mekor.
Nevertheless, a few years I was told by Rabbi Motti Berger that the poshut peshat in several places in Nevi’im and the meforshim is that the majority of, if not all, Jews living in Chutz La’aretz will R”L perish. He added that of course no one can know exactly what will happen, but that that is the poshut pshat.