What does the Bible say about the confederacy with false gospels?

Isaiah 8:11-13 admonishes the people of God not to join in a confederacy with those who do not truly know God, calling on them to sanctify the Lord of hosts as their fear and dread. This message engages the heart of God's people to remain steadfast in the truth and not be swayed by the allure of false teachings that soften the unique nature of the gospel. Enduring hardness as soldiers of Christ requires that we recognize the temptation to blend in for the sake of convenience, reminding us that true unity cannot be found in error but in the unwavering gospel of Christ.