ok, Now I'm going to argue that Not everyone is a Christian (just to save myself and yourselves some typing - I found some stuff on the net)
Is everyone a Christian ?
No - The reason being, God's word clearly states in many scriptures, that Jesus Christ and God the Father, only abides in those who believe in Him by a sincere Faith, and obeys His teachings and commandments.
First of all, part of the esssential doctrines of Jesus Christ is to beware of false teachers, and false christs and not to follow false gods, and idols, so we know that anyone who does believe in such, or other religions or witchcraft, etc... does not have Jesus Christ nor God the Father within them.
Only the believers of Jesus Christ, who purpose to continue to repent from sin, through Jesus Christ, abides His in Grace, has both God the Father and Jesus Christ in them.
Only the believers of Jesus Christ, who continues in God's Word, and obeys the teachings and commandments of Jesus Christ, by faith, receives the Holy Spirit of God, obtains His Mercy when they sin, Loves and forgives one another in the way Jesus Christ taught, and bears good spiritual fruit, only these have both God the Father and Jesus Christ in them.
1 JOHN 2:23 Whoever denies the Son, does not have the Father ( God ) either.
ROMANS 8:9,10 You, however, are controlled not by the sinful nature but by the Spirit, if the Spirit of God lives in you. And if anyone does not have the Spirit of Christ, he does not belong to Christ.
But if Christ is in you, then even though your body is subject to death because of sin, the Spirit gives life because of righteousness.
MATTHEW 7:13-27; “Enter through the narrow gate. For wide is the gate and broad is the road that leads to destruction, and many enter through it. 14 But small is the gate and narrow the road that leads to life, and only a few find it.
15 “Watch out for false prophets. They come to you in sheep’s clothing, but inwardly they are ferocious wolves.16 By their fruit you will recognize them. Do people pick grapes from thornbushes, or figs from thistles?17 Likewise, every good tree bears good fruit, but a bad tree bears bad fruit. 18 A good tree cannot bear bad fruit, and a bad tree cannot bear good fruit. 19 Every tree that does not bear good fruit is cut down and thrown into the fire. 20 Thus, by their fruit you will recognize them.
21 “Not everyone who says to me, ‘Lord, Lord,’ will enter the kingdom of heaven, but only the one who does the will of my Father who is in heaven. 22 Many will say to me on that day, ‘Lord, Lord, did we not prophesy in your name and in your name drive out demons and in your name perform many miracles?’ 23 Then I will tell them plainly, ‘I never knew you. Away from me, you evildoers!’
24 “Therefore everyone who hears these words of mine and puts them into practice is like a wise man who built his house on the rock. 25 The rain came down, the streams rose, and the winds blew and beat against that house; yet it did not fall, because it had its foundation on the rock. 26 But everyone who hears these words of mine and does not put them into practice is like a foolish man who built his house on sand. 27 The rain came down, the streams rose, and the winds blew and beat against that house, and it fell with a great crash.”
JOHN 3:3 In reply Jesus declared, "I tell you the truth, no one can see the kingdom of God unless he is born again."
1 JOHN 4:12-16 No one has seen God at any time. If we love one another, God abides in us, and His love has been perfected in us. 13 By this we know that we abide in Him, and He in us, because He has given us of His Spirit. 14 And we have seen and testify that the Father has sent the Son as Savior of the world. 15 Whoever confesses that Jesus is the Son of God, God abides in him, and he in God. 16 And we have known and believed the love that God has for us. God is love, and he who abides in love abides in God, and God in him.
1 JOHN 3:10 In this the children of God and the children of the devil are manifest; Whoever does not practice righteousness is not of God, nor is he who does not love his brother.
JOHN 14:23 Jesus replied, "If anyone loves me, he will obey my teachings. My Father will love him, and we will come to him and make our home with him.
1 JOHN 5:12 He who has the Son has life; He who does not have the Son of God does not have life.
JOHN 11:10 But if one walks in the night he stumbles, because the Light is not in him.
1 JOHN 2:15 Do not love the world, or the things in the world, if anyone loves the world, the Love of the Father is not in him.
2 JOHN 1:9 Whoever trangresses...Whoever does not abide in the doctrine of Christ does not have God.
1 JOHN 1:10 If we say that we have not sinned, we make him a liar and His Word is not in us.
1 JOHN 1:8 If we say that we have no sin, we deceive ourselves and the Truth is not in us.
JOHN 15:1-17; “I am the true vine, and my Father is the gardener. 2 He cuts off every branch in me that bears no fruit, while every branch that does bear fruit he prunes so that it will be even more fruitful. 3 You are already clean because of the word I have spoken to you. 4 Remain in me, as I also remain in you. No branch can bear fruit by itself; it must remain in the vine. Neither can you bear fruit unless you remain in me.5 “I am the vine; you are the branches. If you remain in me and I in you, you will bear much fruit; apart from me you can do nothing. 6 If you do not remain in me, you are like a branch that is thrown away and withers; such branches are picked up, thrown into the fire and burned. 7 If you remain in me and my words remain in you, ask whatever you wish, and it will be done for you. 8 This is to my Father’s glory, that you bear much fruit, showing yourselves to be my disciples.
9 “As the Father has loved me, so have I loved you. Now remain in my love. 10 If you keep my commands, you will remain in my love, just as I have kept my Father’s commands and remain in his love. 11 I have told you this so that my joy may be in you and that your joy may be complete. 12 My command is this: Love each other as I have loved you. 13 Greater love has no one than this: to lay down one’s life for one’s friends. 14 You are my friends if you do what I command. 15 I no longer call you servants, because a servant does not know his master’s business. Instead, I have called you friends, for everything that I learned from my Father I have made known to you. 16 You did not choose me, but I chose you and appointed you so that you might go and bear fruit—fruit that will last—and so that whatever you ask in my name the Father will give you. 17 This is my command: Love each other.
(source:
http://disciplechristian.com/is-christ-in-everyone.html)