Do not let yourself be confused by the myriad persons using the label Christian. Look at them through the Jesus or Bible lens.
Jesus repeatedly stressed that all are called including him to suffer and die rather than let God down.
Paul the apostle gives a further example of this.
In Acts 20:24, Paul said he counts his life as having no value so that he might finish the work God laid out for him to do.
Paul in Ephesians 6 asks slaves to obey masters with fear and trembling as they do Jesus. But they are warned to make it about Jesus not the master. “Do it as to the Lord and not to men and not to women.”
The command to be all for God means you treat others as God wants them treated so it all comes back to God. There is no command to love yourself. It is merely said you already do that so you must treat others as if they were you. "Love your neighbour as yourself" is one command. It is not, "Love yourself," and it is not, "Love your neighbour"..That is two commandments. The command is about the neighbour.
Another example of this is in Matthew 18. There Jesus speaks of his alleged love for children. Then he lays down the rule that the victim of a person's word is not enough. In a society that did not protect children and forced many of them into premature sexual relationships in the name of producing babies, this was horrific. And the Roman colonisers were routinely raping women and children. This clearly tells you that if you are a victim then say nothing for its is not loving to the "neighbour" who attacked you.
Baltimore Catechism, 109. Q. What is Charity?
A. Charity is a Divine virtue by which we love God above all things for His own sake, and our neighbor as ourselves for the love of God.
St Augustine of Hippo: "Choose to love whomsoever thou wilt: all else will follow. Thou mayest say, "I love only God, God the Father." Wrong! If Thou lovest Him, thou dost not love Him alone; but if thou lovest the Father, thou lovest also the Son. Or thou mayest say, "I love the Father and I love the Son, but these alone; God the Father and God the Son, our Lord Jesus Christ who ascended into heaven and sitteth at the right hand of the Father, the Word by whom all things were made, the Word who was made flesh and dwelt amongst us; only these do I love." Wrong again! If thou lovest the Head, thou lovest also the members; if thou lovest not the members, neither dost thou love the Head."
He is saying that all love is really love of God. That is how he can say that those who love only the Father also love Jesus by default though he is not the Father.
Human nature does not need God to justify the theory of right and wrong. It is said that God is the only justification. We are built to do without him and it for we need to fit in reasonably with others and who cares what our motive is as long as it is that one? Religion tries to get us to base right and wrong on God or more correctly belief in God. All that can do is discourage us and maybe rob us of our whole potential for it is unnatural. It implies too that we must put consciously thinking of the theory first to test ourselves to make sure we are in accord and harmony with it. The God botherer when lives are to be saved and every second counts will pause anyway to check out his state. And if the God theory is false, it takes away from the goodness of our intentions. What would you think of a person who would not do good unless they were commanded to do it by a person or a principle?