Fortunately what you post is not a Christian practice.
Yes,
not anymore, thanks to the Enlightenment.
There were scriptures written after Abraham as well as many Prophets that came after him. I'm a simple man and the bible wasn't made to be difficult - what should be easy to conclude from what came after Abraham is that 'they all talk about him' therefore he is vouched for.
Just as Jesus validates Abraham!
Yes, many biblical authors
mentioned Abraham, but almost no one "validated" his attempt to murder his son based on voices he heard in his head. Jesus certainly didn't.
Paul praised Abraham for believing Yahweh, but for what he doesn't specify. The author of James said he was justified in trying to kill Isaac. The author of Hebrews called it an act of faith, and even tossed in an extra bit about how Abraham must have somehow known that Yahweh would resurrect Isaac from the dead, but of course there's nothing in the Genesis passage to indicate that was true. I suspect it was a rationalization on the more-enlightened author of Hebrews who must have been a little bit horrified at the swift obedience of Abraham to commit child sacrifice.
You, Learner, on the other hand, don't have biographers writing hundreds or thousands of years from now to praise you for your obedience so you've decided that you must be suffering from a mental delusion if you hear a voice in your head that says, Prove how much you love me by killing your son.
Very well, then. I'll amend the circular logic of yours that I posted earlier in light of your counter-argument:
How do we know that Abraham was chosen by God? Because God stopped him from murdering Isaac.
And how do we know that God stopped him? Because
Abraham the biographers of Abraham told us so.
And why do we believe Abraham's story? Because
people have read that Abraham was chosen by God.
I sincerely hope for the sake of your son that you don't ever believe that you've been chosen by God the way Abraham supposedly was.