Here is the conclusion from the Lord. Those who will not repent are not numbered with the church, are not part of God's covenant. That they may still be part of the community is implicit. They are denied the church, not the community. However, with the removal of the covenant from the community, those who do not repent are members of the community only, and no longer may consider themselves as an inheritor of the covenant.
Alma is told that there is now a real division between the church and the rest of the community. While all may be under Mosiah's rule, only those who accept the atoning Messiah are part of the church, and part of the covenant with God.