My mother was Protestant. My father's father was Catholic, but his mother was Jewish. My family survived the holocaust in Europe, with great struggle.
I know that by traditional Jewish law I am not Jewish, but I feel that I more than qualify to be a Jew. I read books about Jews. I support Israel. I even had a bar mitzvah. The worst part is that the people who tell me I am not Jewish are rabbis! They said I would have to convert to Judaism. I do not understand why they say this. My family survived the greatest atrocities in the history of the Jews. How can I convert, when I feel that I already am Jewish....
In Biblical Israel, every citizen was landed. If you were a descendant of one of the twelve tribes, you owned a plot of land. If you sold it, it came back to you--or to your inheritors--on the jubilee year, which occurred every 50 years. You were tied to the land and the land was tied to you. Inheritance of land was through the paternal line--just as tribal affiliation is patrilineal.
I'm mentioning this because, in Torah law, a very similar relationship exists between the Torah and a Jew, between a Jew and his Jewishness. A Jew can abandon the Torah, but the Torah never abandons him--eventually it will return, if not to him, then to his children, if not to his children, then to his children's children. So too, a Jew may imagine that he has abandoned his Jewishness, and yet always remains a Jew--as do the children of that Jew, and the children of those children.
There are two distinctions, however, between the relationship of a Jew to his share of the land and the relationship of a Jew to Torah and Jewishness. One is that it is possible to sell one's plot of land--although it will still return, for that period of time, it is sold. Torah and Jewishness, on the other hand, are not for sale. No matter how hard a Jew may try, he never truly can let go of either.
The other distinction is that Jewishness--and therefore the relationship to Torah--is not patrilineal, but matrilineal. Perhaps these two distinctions are related: The maternal line strikes much deeper to the essence of who you are, and that essence is something that not only will always return, but can never truly be abandoned.
Despite all this, the child whose father married out of his people can still claim his father's heritage. His challenge is greater than the child whose Jewish mother brought him by default into her people. In his case, it is up to him to decide whether he wants to make the commitment to join his father's people and to fulfill all the obligations the Torah places upon this nation. He must also become circumcised and immerse in a mikvah before a qualified bet din.
If this is the path you wish to follow, I am willing to assist to whatever degree is within my capacity. If not, it is good to have you as a friend of the Jewish People. The righteous of humankind, no matter to which family, tribe or nation they belong, all have a share in the world to come.