Wasn't the blood of the Passover lamb to appliedshalom b'SHEM Yah'shua HaMashiach
to the doorpost to protect from the Angel of death ?Weren't all who in the house covered by the blood,
both gentile and Jew.Wasn't Isaac replaced by a lamb as a blood sacrifice ?
"An Israelite slaughters the Passover Lamb and a priest received the blood,
hands it to his fellow, and his fellow to his fellow, each one receiving a full
basin and handing back an empty one. The priest nearest the altar tosses
the blood in a single act." (Pesachim 5:6)
Yes but it only was to spare the life of the Jews in the house. Their sin status would have been unchanged. Yom Kippur, is the Day of Atonement, which involves forgiveness. Plus, the three main means of forgiveness of sin without blood, Prayer, Repentance, Charity.
"Weren't all who in the house covered by the blood, both gentile and Jew." Gentiles are forbbiden to partake unless they have been circumsized (accepted the covenant of Moses):
Passover Restrictions 43 The LORD said to Moses and Aaron, "These are the regulations for the Passover: "No foreigner is to eat of it. 44 Any slave you have bought may eat of it after you have circumcised him, 45 but a temporary resident and a hired worker may not eat of it.
46 "It must be eaten inside one house; take none of the meat outside the house. Do not break any of the bones. 47 The whole community of Israel must celebrate it.
48 "An alien living among you who wants to celebrate the LORD's Passover must have all the males in his household circumcised; then he may take part like one born in the land. No uncircumcised male may eat of it. 49 The same law applies to the native-born and to the alien living among you."
"Wasn't Isaac replaced by a lamb as a blood sacrifice ?"
No, he was replaced by a Ram. Thus making it clear that G-d was never to accept human sacrifice. Even though Issac was willing, G-d provided a Ram, animal offering.