Whatever your denominational title, whatever your theological system, beware of exalting yourself over other believers. And beware of falsely assuming that other people who disagree with you are not Christians or they are wrong. If you have not studied God's Word yourself, with a humble spirit seeking Him, then be very, very slow to judge others. If we really want to please God then we will ask HIM to give us HIS heart and HIS eyes and ears. ... HIS way of seeing things, HIS real love. We will go to God's Word with the mentality, "Father, if I am wrong about anything please show me and help me humble myself and change. Father help me not to look down on others or separate myself from other true Christians because I have some kind of a doctrinal system that I put too highly. God please show me if I'm wrong."
If you will pray this, God will honor it. Lastly, if you know other Christians and you are hesitant to be around them or fellowship with them because they have a different title, and you assume they are something, beware of that also. This often hinders God's work. Let us walk in love and wisdom.