God's people keep the commandments of God. The Passover is the commandment that God has given us. And when we keep the Passover, we can love God fully and stand on God's side.
If we keep the Passover, other gods are judged and we can serve only God. Therefore if we want to go back to God then we must keep the Passover.

Ex 12:11-14 This is how you are to eat it: with your cloak tucked into your belt, your sandals on your feet and your staff in your hand. Eat it in haste; it is the LORD's Passover. "On that same night I will pass through Egypt and strike down every firstborn--both men and animals--and I will bring judgment on all the gods of Egypt. I am the LORD. The blood will be a sign for you on the houses where you are; and when I see the blood, I will pass over you. No destructive plague will touch you when I strike Egypt. "This is a day you are to commemorate; for the generations to come you shall celebrate it as a festival to the LORD -a lasting ordinance.

God told emphatically that the one who do not celebrate the Passover must be cut off from his people.

Deu 9:10-13 "Tell the Israelites: 'When any of you or your descendants are unclean because of a dead body or are away on a journey, they may still celebrate the LORD's Passover. They are to celebrate it on the fourteenth day of the second month at twilight. They are to eat the lamb, together with unleavened bread and bitter herbs.
They must not leave any of it till morning or break any of its bones. When they celebrate the Passover, they must follow all the regulations. But if a man who is ceremonially clean and not on a journey fails to celebrate the Passover, that person must be cut off from his people because he did not present the LORD's offering at the appointed time. That man will bear the consequences of his sin.

God has never acknowledged the one who didn't keep the Passover which is the Commandment of God as His people. The Passover is the way of life which God opens to the one who grew apart from God because he/she betrayed God by serving other gods so that he/she can repent and go back to God. Thus King Hezekiah realized that the Passover is the way back to God and sent couriers throughout Israel and Judah who didn't keep the Passover for a long time encouraging to come back to God by keeping the Passover.

2 Ch 30:1-6 Hezekiah sent word to all Israel and Judah and also wrote letters to Ephraim and Manasseh, inviting them to come to the temple of the LORD in Jerusalem and celebrate the Passover to the LORD, the God of Israel. The king and his officials and the whole assembly in Jerusalem decided to celebrate the Passover in the second month. They had not been able to celebrate it at the regular time because not enough priests had consecrated themselves and the people had not assembled in Jerusalem. The plan seemed right both to the king and to the whole assembly. They decided to send a proclamation throughout Israel, from Beersheba to Dan, calling the people to come to Jerusalem and celebrate the Passover to the LORD, the God of Israel. It had not been celebrated in large numbers according to what was written. At the king's command, couriers went throughout Israel and Judah with letters from the king and from his officials, which read: "People of Israel, return to the LORD, the God of Abraham, Isaac and Israel, that he may return to you who are left, who have escaped from the hand of the kings of Assyria.

Jesus Christ came to this earth and proclaimed the Passover as the New Covenant while He is celebrating it with His 12 disciples in the Mark's upper room.

Luk 22:7-20 Then came the day of Unleavened Bread on which the Passover lamb had to be sacrificed. Jesus sent Peter and John, saying, "Go and make preparations for us to eat the Passover." ··· When the hour came, Jesus and his apostles reclined at the table. And he said to them, "I have eagerly desired to eat this Passover with you before I suffer. ··· And he took bread, gave thanks and broke it, and gave it to them, saying, "This is my body given for you; do this in remembrance of me." In the same way, after the supper he took the cup, saying, "This cup is the new covenant in my blood, which is poured out for you.

For us, the sinners who are doom to die forever because we were rebelled against God in Heaven and were expelled down to this earth, God Himself established the New Covenant which is the law of salvation through His great sacrifice of redemption on behalf of us. Nevertheless if we do not keep the Passover and reject it then the sin will be more aggravated.
We who are living in the age of the Holy Spirit should return to God by keeping the Passover of the New Covenant. Nowadays we keep the Passover, the commandment of God, by the grace of God the Father and Mother. We have to give thanks and glory to our God the Father and Mother allowed us the chance to go back to our Home Heaven again and preach diligently the Passover which is the way back to God to the whole world.