Since salvation was brought up here...
That if thou shalt confess with thy mouth the Lord Jesus, and shalt believe in thine heart that God hath raised him from the dead, thou shalt be saved. - Romans 12:9
And they said, Believe on the Lord Jesus Christ, and thou shalt be saved, and thy house. - Acts 16:31
Forasmuch then as we are the offspring of God, we ought not to think that the Godhead is like unto gold, or silver, or stone, graven by art and man's device. And the times of this ignorance God winked at; but now commandeth all men every where to repent: -Acts 17:29-30
If my people, which are called by my name, shall humble themselves, and pray, and seek my face, and turn from their wicked ways; then will I hear from heaven, and will forgive their sin, and will heal their land. - 2 Chronicles 7:14
So, this is the requirement of God, that we should all humble ourselves and confessing the name of Jesus. This is what God desires. But the Galatians complicated the Gospel...
I marvel that ye are so soon removed from him that called you into the grace of Christ unto another gospel: Which is not another; but there be some that trouble you, and would pervert the gospel of Christ. But though we, or an angel from heaven, preach any other gospel unto you than that which we have preached unto you, let him be accursed. As we said before, so say I now again, if any man preach any other gospel unto you than that ye have received, let him be accursed. -Galatians 1:6-9
This is the manner of Satan himself... To complicate the Gospel, and then tell the unwary that they are not 'obedient' if they do not buy into the complication.