Need to be a Jew or a Child of the Tribe of Israel?

I find no covenant with G-D that was made only with Jews. The Children of Israel, YES! But, I have found no covenant made exclusively with Jews.

There is the Conversion of the Stranger in Your Midst in Exodus 12:47) All the congregation of Israel shall keep it. 48) And when a stranger shall sojourn with thee, and will keep the passover to the LORD, let all his males be circumcised, and then let him come near and keep it; and he shall be as one that is born in the land; but no uncircumcised person shall eat thereof. 49)One law shall be to him that is home born, and unto the stranger that sojourneth among you.' --JPS1917 Translation.

As I read this,Only the Congregation of Israel(Children) may partake in the Passover Offering(a Feast unto Our LORD). Yet, the stranger that keeps G-D's Law and is circumcised, is to be accepted as one that is born in the land (a Child of Israel) and is required by Law to Keep the Passover along with all other Commandments.--See the Writings of Moses for all the details.

In order for me to understand this, as one that strives to Keep G-D's Law, the other component is Circumcision. What does that mean, being circumcised. (Genesis 17:7 And I will establish My covenant between Me and thee and thy seed after thee throughout their generations for an everlasting covenant, to be a God unto thee and to thy seed after thee.) --That is the deal that the circumcision is a sign of. Specifically, "to be a God unto thee and to thy seed after thee. "

I choose G-D as my G-D and HE Agrees to be my G-D. When I agree to that, having put the sign of that deal in my flesh, I am a Child of Israel, before G_D. Man plays other games concerning who is and who is not, but they are not binding upon the G-D of Abraham, Isaac and Jacob. I accept the word of G-D above all others.

Shalom