I can guarantee you are not even knowledgeable of the Gospel that Yahshua preached or that was preached to Abraham...keep studying. You are preaching the gospel the church preaches not the one that Yahshua preached or that was told to Abraham.
No, you cannot guarantee any such thing. All you can do is presume I lack knowledge because I don't happen to agree with the accursed gospel you preach. I can, and HAVE, shown you the truth of the gospel from the sacred Scriptures but I cannot change your heart from the pride you seem to feel for the works you do to merit salvation - only the Holy Spirit does that. You, and those who hold the same beliefs, are fallen from grace because you think you can be justified by the keeping of the law. Scripture says Abraham believed God, and God counted him as righteous because of his faith (Gal. 3:6 as well as many others).
Thank you for sharing your thoughts and opinions, though.
“Beware of false prophets, who come to you in sheep’s clothing, but inwardly they are ravenous wolves.
You will know them by their fruits.