Then if anyone goes out of the doors of your house into the street, his blood shall be on his own head, and we shall be guiltless. But if a hand is laid on anyone who is with you in the house, his blood shall be on our head.
Joshua 2:19

These instructions echo what God told Israel before the Exodus. If any Israelite didn't put the lamb's blood on the door or left the house before morning, his death would be his own fault. No matter who your ancestors are, if you reject God's grace, you are on your own. It's not enough to be a Jew or an Israelite or "culturally Christian". You must believe in Him for yourself.