d. A conversion to Messianic Judaism would not be recognized in Israel nor among a majority of Jews in the Diaspora.
This point can be addressed in several ways, I will list three
1. Orthodox Judaism does not accept conversions as valid that were performed by Conservative, Reform, Reconstructionist and Humanistic rabbis, yet all four movements continue to perform conversions.
Being that only conversions that are performed by an Orthodox rabbi are considered as valid by all Jews across the spectrum has not stopped the non-Orthodox movements to develop conversion programs. They perform their conversion rituals and recognize the conversions of other groups as valid. So then universal acceptance of conversion is not a bar to other Jewish groups, why should it be a bar to us?
2. Whether or not Israel recognizes our converts is not relevant, the fact that Israel has barred Jewish believers from citizenship hasn’t stopped Jewish believers from seeking to live in Israel.
We cannot decide our community standards and life to fit into the laws of Israel. Being that Messianic Jews have been barred from citizenship hasn’t stopped messianic Jews from seeking to immigrate to Israel.
3. A majority of Jews in the Diaspora do not recognize Messianic Jews as Jews.
Most Jews, I would say well over 90% would not consider Messianic Jews as Jews and Messianic Judaism as a valid expression of Jewish faith, does this stop us from being Messianic? The fact that our status as outsiders from the Jewish people has not hurt our claim to being who we are then why are we concerned with recognition of our conversions as valid? We need to do first and hope that the larger Jewish community will eventually recognize that we have truly committed non-Jews that are making a commitment to live with the Jewish people and dwell in Jewish space. As we have seen some inroads from the Jewish world to accept us as Jews who follow Yeshua, we hopefully can get recognition of these people that we are allowing to enter Am Israel.
So then we are already outside the Jewish people in the opinion of a majority of the Jewish community, yet we continue on as Messianic Jews, the question of the acceptance of Messianic conversions by the larger Jewish world should be less important than doing what is right for our community and the furtherance of Messianic Judaism.