I find that the insinuation that Hashem “changed His mind” to “demonstrate” how the Rebbe could’ve changed his mind to be absolutely revolting. Hashem revealed the Torah when he had a people to give to, when it was the right time in the creation for a nation to accept the Torah, He does not change His mind, the conditions change! Same as with anything else in the Torah where it may appear to humans that “Hashem changed His mind”; the conditions changed, not Hashem’s mind! The speaker could’ve used the argument that the conditions changed and therefore the Rebbe’s opinion changed regarding “yechi”, but he did not do so. Instead they are so used to deifying the Rebbe that they resort to actual kefira to try to in their mind “minimize” Hashem’s power and greatness so that they can “compare” their Rebbe’s actions to Hashem! Total idolatry!