It is as fact based as his discussions regarding evolution are. With all due respect for the great man’s learning, when it comes to FACTS, those remain to be ascertained from every source possible. When “gedolei rabbonei CHABAD” emphatically state that the Rebbe never went bareheaded, that is contradicted by the statement of Rabbi Soloveichik, who saw him walking thus in Berlin on a daily basis, whereas the Lubavicher rabbis weren’t even there. Still, one may say that its their word against his. True, until one sees a readily available photo of the Rebbe from those days, that amply proves Rabbi Soloveichik’s words.
People who were specifically told not to leave Europe by their Rabbis provide enough evidence to the veracity of their statements, corroborated by multitudes. No matter how one may wish to defend the rabbinical stance, even if perfectly correct, they DID tell their followers to remain in Europe. This fact remains, as does the one that some used any means to escape, while their flock remained under the Nazi rule. I am not accusing any of them of hypocrisy or abandonment. Possibly they felt that they had to save themselves to rebuild Torah. While that answer may be more than adequite, the fact remains a fact that while their followers went to Treblinka, they were spirited out to safety that they had previously advised against.
Until one acknowledges factual truth, even if with explanation, one isn’t worthy of a debate, or even of a reply. Until then, go and rewrite the TNa”CH, where the greatest of the great are openly castigated for their mistakes.