A Jewish soul is brought into the world to a Jewish mother and father. The child is raised void of a Torah education and meets a non Jewish girl. He marries her and has non Jewish children. He lives a full life so it seems and at a ripe age of 100 leaves the world. A Jewish connection to Hashem has now but completely cut from the world.
a second scenario…
A Jewish soul is brought into the world to a non Jewish mother and father. The child is raised in a Christian home yet always feels that this is not the way for spiritual fulfillment. As the child grows up this becomes more and more evident till the child becomes an adult and converts to Judaism. This Jew finds a Jewish man and they get married. They raise children that are filled with the life of Torah. A Jewish connection to Hashem has now been created and possibly rectifies scenario one.
For your thoughts are not my thoughts, and your ways are not my ways, says the Lord”
Be careful how we judge our fellow Jews, especially the convert. We have no idea how they fit into Hashem’s plan which will culminate in the ultimate redemption of the Jewish people, and revelation of Hashem’s name with the coming of Moshiach Tzedkeinu B’Karov Mamash!