Contradiction with John 15:19
This verse states that the world would hate you because you are not of the world, which contrasts with the notion of being called children of God whom the world does not know in 1 John 3:1.
John 15:19: If ye were of the world, the world would love his own: but because ye are not of the world, but I have chosen you out of the world, therefore the world hateth you.
Contradiction with John 17:14
Suggests that believers are hated by the world because they are not of it, conflicting with the idea of being unrecognizable as God's children in 1 John 3:1.
John 17:14: I have given them thy word; and the world hath hated them, because they are not of the world, even as I am not of the world.
Contradiction with Matthew 5:44
Encourages love for enemies and prayer for persecutors, implying recognition and possible disdain, contrasting with the world not knowing God's children as stated in 1 John 3:1.
Matthew 5:44: But I say unto you, Love your enemies, bless them that curse you, do good to them that hate you, and pray for them which despitefully use you, and persecute you;
Contradiction with James 4:4
Indicates enmity with God if one is a friend of the world, in opposition to the implication of the world's ignorance of God's children in 1 John 3:1.
James 4:4: Ye adulterers and adulteresses, know ye not that the friendship of the world is enmity with God? whosoever therefore will be a friend of the world is the enemy of God.