Your doctrine here sounds good. It’s just the notion that “we’re all children of God” that’s off. Jesus told some of the religious leaders that they were “children of Satan,” which tells me that the weren’t “children of God” at the time....
I don't think it is so much doctrine between us as it may be semantics. I know Jesus carried me when there was only one pair of footprints in the sand until I came to know and trust only Him. From that day on, I belong to Him but I'm not perfect and can be enticed by satan. The Holy Spirit lives in me and always pulls me back and keeps me from trouble of the satan kind. Maybe I don't say it as clearly as you but I've invested a lot in my relationship with Him and my life means something for Him and to His glory. That is my purpose.
If we are separated on this one point, we'll have eternity to discuss it. Thanks for the dialog.
Being children of God is not inherent in being human. It only comes as a matter of will, receiving Christ.
John 8:42-47 Jesus said to them, "If God were your Father, you would love me, for I came from God and now am here. I have not come on my own; but he sent me. Why is my language not clear to you? Because you are unable to hear what I say. You belong to your father, the devil, and you want to carry out your father's desire. He was a murderer from the beginning, not holding to the truth, for there is no truth in him. When he lies, he speaks his native language, for he is a liar and the father of lies. Yet because I tell the truth, you do not believe me! Can any of you prove me guilty of sin? If I am telling the truth, why don't you believe me? He who belongs to God hears what God says. The reason you do not hear is that you do not belong to God."