Galatians 4:19 My little children, of whom I travail in birth again until Christ be formed in you,
The Galatians had gone into legalism. They were trying to do in their own power what only God can do in His. Paul wants them to be conformed to the image of Christ. He wants them to develop Christlike character.
As they learn what He has done on the cross they are able to focus on Him. As they focus on the Lord and not each other they will be able to grow in Christ.
There is by no means a willingness to just live and let live or simply hang out spiritually. The idea is that Christlike character is formed on the be level. As you get into the Word of God and it gets into you then you will be changed.
Change your heart, the way you think and then your thoughts and actions will change. You do not need to be circumcised. You do need to focus on Jesus and what He has done for you.
As you focus on Him then He will bring about the changes in you!