Re, nitzachon:
First you say that the wars are spiritual, and now you’re agreeing that they’re physical when it suits your “diyuk” that a messianic candidate is killed during the wars…
But it’s not a diyuk, because even if all the wars are finished, if he didn’t bring all of yisroel to teshuva and build the beis hamikdash, but was killed/died, he is also disqualified, because “if he was not successful to this point” meaning all of the above, or if he was killed, again, before doing all of the above, then he is not the one the torah promised etc…