Relationship between God's people―His temple―and the feasts

The Bible tells us that celebrating the feasts of God is a necessary condition for entering the kingdom of heaven, and that those who celebrate the feasts are given a great blessing as follows:

1 Co 3:16-17 『Don't you know that you yourselves are God's temple and that God's Spirit lives in you? If anyone destroys God's temple, God will destroy him; for God's temple is sacred, and you are that temple.』

The Bible describes us as the temple of God. This implies that the temple is where the covenant of God exists. The temple is a place where we offer sacrifice to God in accordance with the words of the covenant given by God: burnt offering for the Sabbath and offerings for the appointed feasts. So we are to become the temple of God where the feasts are celebrated, in order to attain salvation and reach the heavenly kingdom.
In the Old Testament times, the blood sacrifice of animals was offered in the temple, and in the New Testament times it has been changed into a spiritual sacrifice―the worship in spirit and truth.

Now, each one of us, not a visible building itself, is the temple of God. Every saint, the temple of God, is to worship on the weekly Sabbath and also at the seven annual feasts three times a year. If no worship is offered in the temple at God's appointed times, it doesn't need to exist anymore. There are numerous churches around the world, and many who claim to believe in God are confident that they will enter the kingdom of heaven. However, their faith is vain unless they keep the feasts of God, even though they are so diligent in living out their faith through their own worship. If they keep Sunday and Christmas originated with sun worship, they are already the temple of the sun, not the temple of God.

Through the Old Testament history, we can see that God was enraged when His temple was full of idols and abominable things. If there is no covenant and no celebration of God's feasts including the Sabbath in the temple―each individual Christian, the temple is already devastated and defiled. God said He would destroy the temple, the person. Can he be saved then? Never. The Bible clearly tells us the final outcome of the false churches that do not celebrate the feasts of God.