As mentioned not everyone that names the name Christian is one, here or out there. You can tell who are the regenerate and the un-regenarate or very immature by the way they talk to people they disagree with. They always have opinions with no Scripture or if they do have Scripture it's out of context. They will exalt themselves over God, in their salvation.
Brother II Timothy 2:23-25 "Have nothing to do with foolish, ignorant controversies; you know that they breed quarrels.24 And the Lord's servant must not be quarrelsome but kind to everyone, able to teach, patiently enduring evil,25 correcting his opponents with gentleness. God may perhaps grant them repentance leading to a knowledge of the truth,"