WHY FELLOWSHIP NEEDS TO BE RESTRICTED?
God’s children are “…endeavoring to keep the unity of the Spirit in the bond of peace. There is one body, and one Spirit, even as you are called in one hope of your calling; one Lord, one faith, one baptism, one God and Father of all, who is above all, and through all, and in you all,” Ephesians 4:3-6. (Reading the whole chapter would be beneficial.) There are not ‘many roads to heaven’.
This highlights the importance of the disciples being united in understanding when meeting to worship our God. It is God, through his messengers, that warns of the dangers of wicked and unbelieving members in the church. 2 Corinthians 6:14.
Sharing of the emblems of bread and wine is a command of Christ, and is restricted to those professing the principles of our faith. Similarly, every professional career likewise is founded on fundamentals that conform to the basis of their particular discipline. Doctors, lawyers, electricians and every career must agree to the ‘principles’ of the respective trade or association.
It is not enough to say “I believe in the God of the Bible” in order for fellowship to have it’s benefit. See also 1 Corinthians 1:10 and 1 Corinthians 12:13.
Communion as appointed by Jesus Christ identifies the believers as members of the one Body, associated in Christ and there can be no communion of light with darkness: 1 Corinthians10:16, Ephesians 4:16-18, 2 Corinthians 6:16-17, Deuteronomy 7:2-6, Ephesians 5:11.
This does not negate the command of Christ to preach the Gospel to as many as will hear. All are welcome but communion needs to be restricted to those professing believe and who are associated with Christ through confession and baptism.