The Targum Pseudo-Jonathan lets us listen in on Esau's inner counsel, and it is chilling. "Esau said in his heart, I will not do as Kain did, who slew Habel in the life (time) of his father, for which his father begat Sheth, but will wait till the time when the days of mourning for the death of my father come, and then will I kill Jakob my brother, and will be found the killer and the heir" (Genesis 27:41).
Esau has thought this through. He studied Cain. He will not make Cain's mistake.
The calculated murderer
The rabbis read this passage as a chilling inversion of moral learning. Esau has read Jewish history and drawn the wrong lesson. Cain killed Abel during their father Adam's lifetime — and Adam, bereaved, fathered a replacement son, Seth (Genesis 4:25). Esau has calculated: if he kills Jacob while Isaac still lives, Isaac may have another son who will inherit the blessing. The solution? Wait for Isaac to die first.
Then, as Esau says explicitly, I will be found the killer and the heir. Not just the murderer — the inheritor. Pseudo-Jonathan wants us to feel the full coldness of this. Esau is not consumed by passion. He is plotting a schedule.
The broken yoke postponed
The Targum's detail complicates the whole arc. Moments ago, Isaac blessed Esau with eventual liberation — conditional on Jacob's descendants falling from Torah. But Esau does not wait for conditions. He plans immediate violence. The contrast is sharp: the father's blessing offered Esau patience and a conditional future. Esau answers with a calendar for murder.
The takeaway: the rabbis warn that the worst sins are not hot. They are cold. They are plotted. They sit down with the family calendar. Pseudo-Jonathan's Esau is not the wild hunter of popular imagination. He is a man who has learned from Genesis 4 exactly the wrong thing.