You noted a number of poskim
who ruled on the oaths. I see they are all achoronim, and certainly great
scholars, all of them. However, do you know of any rishonim who ruled
halachically the same way?
You often write that the Rambam says moshiach will compel all Jews to do teshuva before the geulah can begin, and that therefore even if Zionism were to claim that a particular person is moshiach, they would not be permitted to establish their state and