Jacob wrestled with God, Hence God renamed him Israel.
Meaning to wrestle with God and survive/flourish/lear
But those who claim Abraham as their father, and don't recognize Isaac and Jacob,
do so to avoid Esau's first born blessing loss.
Remember, the Pharisees speaking to Christ, named jews, denied Isaac and Jacob.
But Judeans claimed the God of Abraham, Isaac and Jacob, they were Israelites, not jews.
Today Islam claims Abraham as their father, but not Isaac or Jacob.
Logically, the jews Christ was addressing, were the same belief system as today's Islamists.