It doesn't make sense that we don't need to keep God's feasts no longer on the basis of Isa. 1:13. If some claims this insistence, it proves they are corrupted people of Sodom and Gomorrah who forsook God's laws.
Therefore, as we are people of God, we should keep God's feasts which were granted by God for salvation.

We must know that to whom Isaiah 1:13 is speaking.
It was not a word for a saint who kept God's commandments well.
Rather, it was spoken to the idolaters who served Baal, leaving the commandments of God.
We must look at the context of the Bible through the context.

In order to understand God's full will, we should read before and after the verse in the context. In order for us to be saved, we must keep God's feasts such as the Sabbath day, the Passover etc. until the end of the world.

When we understand the word of God, we should understand Bible verses in the context, otherwise we can distort the will of God. Isaiah 1:13 doesn't mean that God prohibited or abolished the Sabbath day or the feasts of God such as Passover. God stopped them from bringing offerings for His people who were corrupted and doing evil things. Therefore, their claims is false!

Opposers always try to distract us from the way of truth taught by God, but it doesn't work at all to His people that God has chosen. Since the truth of the Church of God came from God, no one will be able to stop us spreading our truth !

Those who bring the detestable offerings must be blocked to enter the God's sanctuary and God's temple as well. However we need to distiguish the good offerings prepared in God's Sabbaths from the evil offerings made in sun-god veneration in this age.

The one who insist that we no longer need to keep the Feasts of God such as the Sabbath day, the Passover etc. quoting Isa 1:13 are acknowledged themselves that they are the evildoers same like the one who were rebuked by God in Isaiah. Therefore we should not be deceived like that kind of insist. In this age, God's people who are longing for Heaven still have to keep the Feasts of God.

Very clear and true! I would like to ask those who insist on the unnecessity of keeping all the feasts of God, "Then, why are you keeping the Sunday service or Christmas?". In the Bible, the saved is keeping the commandments of God. We should keep God's feasts until the end. That's why Jesus, who is almighty God and didn't keep any feasts, set examples of keeping all the laws of God, the New Covenant. Let's follow what Jesus did as the Bible recorded.