Avira
“Rizhiner chasidim did not say that the rebbe was moshiach, began his mission, and will return to complete it. That is a foreign concept. They’re also careful to say that it will happen the same day, because this does not contradict the rambam and ramban.“
1. Great to hear u don’t think moshiach min hameisim contradicts rambam or ramban. That’s more than others would admit in this thread. That’s the problem here tho, is in order to make the last argument that the rebbe started some mission I have to defend 50 other steps which nobody is in agreement on, some saying ok and some saying not.
2. There ARE Lubavitchers who do argue like the quote about the Ruzhiner. So then u seemingly shouldn’t have a problem with those messianics. This is also the problem, there are many different factions and approaches to this issue, some that are just like the approach u said didn’t contradict rambam and some which u say do. So already we need to slow down and address the different groups. If u met a messianic who argued like the way I explained the Ruzhiner would u have a problem with it since it doesn’t contradict rambam or ramban in your words?
3. I don’t think starting a mission and continuing after death contradicts the Rambam. Rambam says killed which is obviously a stira to kar kar Kol bnei sheis(in other words, he didn’t destroy them but they destroyed him) and he says “not succeed until this degree” which means he actively failed or his actions ceased all together. But that doesn’t really address if someone was not defeated by his enemies in war/killed (in contradiction to the pasuk of kar kar Kol bnei sheis), and who is continuing his actions through soldiers, shluchim etc (whatever the scenario is) for then he didn’t not succeed, as he is still in the middle of his actions Al pi Torah as shliach kmoiso. The Christian says he did some stuff left and then will do the rest. Christians do not see them selves as shluchim of Moshiach who are doing the redemptive actions on his behalf. They are waiting for him to come do them himself and try to be moral believers in the meantime.