The promises to Abraham -- all of them -- were inherited by one seed, Christ, exactly as God promised Abraham. Through Christ are all nations blessed.
Forget the Torah. Christ was the fulfillment of the old covenant; and the old covenant (old testament) was superceded by the new covenant (new testament.) Even Moses, in the Torah, warned Israel to listen to Christ:
"I will raise them up a Prophet from among their brethren, like unto thee, and will put my words in his mouth; and he shall speak unto them all that I shall command him. And it shall come to pass, that whosoever will not hearken unto my words which he shall speak in my name, I will require it of him." (Deu 18:18-19 KJV)
This is that statement as found in the Orthodox Jewish Bible:
"I will raise them up a Navi from among their achim, like unto thee, and will put My words in his mouth; and he shall speak unto them all that I shall command him [Yn 10:18]. And it shall come to pass, that whosoever will not listen unto My words which he shall speak Bishmi (in My Name), I will require it of him." (Deva 18:18-19 OJB)
In the book of Acts, it reads, in context:
"And he shall send Jesus Christ, which before was preached unto you: Whom the heaven must receive until the times of restitution of all things, which God hath spoken by the mouth of all his holy prophets since the world began. For Moses truly said unto the fathers, A prophet shall the Lord your God raise up unto you of your brethren, like unto me; him shall ye hear in all things whatsoever he shall say unto you. And it shall come to pass, that every soul, which will not hear that prophet, shall be destroyed from among the people. Yea, and all the prophets from Samuel and those that follow after, as many as have spoken, have likewise foretold of these days. Ye are the children of the prophets, and of the covenant which God made with our fathers, saying unto Abraham, And in thy seed shall all the kindreds of the earth be blessed. Unto you first God, having raised up his Son Jesus, sent him to bless you, in turning away every one of you from his iniquities." (Acts 3:20-26 KJV)
Philip
So if YHWH can forget his promises to Israel, how then are you assured that he will remember his promises to you?
Forget the Torah.
There's your problem right there.
Christ was the fulfillment of the old covenant;
I think you had better ponder what 'fulfillment' means.
[...] and the old covenant (old testament) was superceded by the new covenant (new testament.)
Each and every covenant dovetails into the next - why wouldn't the Messianic covenant do the same? And in fact, it does.
Even Moses, in the Torah, warned Israel to listen to Christ:
Even as Yeshua warned you to listen to Moses.