There is, amongst the various groupings of the Church of God, an attitude prevailing that one grouping of God’s people is better than another.  Is this normal? Is it correct? What does God think about this attitude?

Paul talked about something similar to this;

Divisions in the Church
(1Co 1:10)  Now I beseech you, brethren, by the name of our Lord Jesus Christ, that ye all speak the same thing, and that there be no divisions among you; but that ye be perfectly joined together in the same mind and in the same judgment.
(1Co 1:11)  For it hath been declared unto me of you, my brethren, by them which are of the house of Chloe, that there are contentions among you.
(1Co 1:12)  Now this I say, that every one of you saith, I am of Paul; and I of Apollos; and I of Cephas; and I of Christ.
(1Co 1:13)  Is Christ divided? was Paul crucified for you? or were ye baptized in the name of Paul?
(1Co 1:14)  I thank God that I baptized none of you, but Crispus and Gaius;
(1Co 1:15)  Lest any should say that I had baptized in mine own name.
(1Co 1:16)  And I baptized also the household of Stephanas: besides, I know not whether I baptized any other.
(1Co 1:17)  For Christ sent me not to baptize, but to preach the gospel: not with wisdom of words, lest the cross of Christ should be made of none effect.

Paul said that this kind of attitude of creating divisions within the body of Christ saying that one “grouping” is better than another is Carnal Thinking

Divisions in the Church
1Co 3:1  And I, brethren, could not speak unto you as unto spiritual, but as unto carnal, even as unto babes in Christ. 
1Co 3:2  I have fed you with milk, and not with meat: for hitherto ye were not able to bear it, neither yet now are ye able. 
1Co 3:3  For ye are yet carnal: for whereas there is among you envying, and strife, and divisions, are ye not carnal, and walk as men? 
1Co 3:4  For while one saith, I am of Paul; and another, I am of Apollos; are ye not carnal? 
1Co 3:5  Who then is Paul, and who is Apollos, but ministers by whom ye believed, even as the Lord gave to every man? 
1Co 3:6  I have planted, Apollos watered; but God gave the increase. 
1Co 3:7  So then neither is he that planteth any thing, neither he that watereth; but God that giveth the increase. 

Paul said that this setting ourselves apart from one another caused envyings, strife, and divisions.  He further stated that it was proof that those who thought and acted that way were yet carnal as men. This attitude puts us at risk as children of God. We are in fact quenching the Spirit of God within us if we maintain this attitude. Any time that we hold onto a belief that is contrary to the way God’s Spirit would have us believe we are weakening that spirit within us.

This attitude is tantamount to a kind of “Spiritual Racism” seeing one group of God’s People as being somehow superior to another grouping is the same kind of attitude that prevails among the White Supremacist groups in the physical world. It is wrong by God’s Standards and none of us should think like that. And yet many of our groups large and small teach their people to NOT associate with or fellowship with others of the body of Christ that are outside of their particular group. I believe that God frowns on this kind of thinking.

God is all about LOVE, we must learn to love our brothers in Christ more than anyone, no matter what grouping of God’s people they belong to.

Php 2:3  Let nothing be done through strife or vainglory; but in lowliness of mind let each esteem other better than themselves. 
Php 2:4  Look not every man on his own things, but every man also on the things of others.
Php 2:5  Let this mind be in you, which was also in Christ Jesus: 

We are to look on others as being better than ourselves. How can we do that if we see them as somehow inferior because of who they choose to associate with or what Minister leads them.

Spiritual Racism is truly a carnal state of mind and should be totally eradicated from the Body of Christ. It has no place here.