They may have been getting 'carried away' and overstating things for rhetorical effect; but Christian's have quite often stated that obedience and surrender to God's will are the primary Christian virtues. But this is wrong; these are clearly the wrong words, the wrong concepts.
Obedience, surrender, submission to divine will is, indeed, apparently the primary virtue for Muslims; but not for Christians.
Men are sons and daughters of God; that is, children who are intended to grow-up; and, from the work and gift of Jesus Christ, we have the possibility of becoming divine and attaining life eternal.
Christians need to distinguish what is appropriate for children, and early stages of development - by contrast with God's main purpose underlying creation. Ultimately; good needs to be chosen, not obeyed; actively-embraced not passively-followed.
In this, as in most things, Jesus is the example for Men.
God's plan and project of creation needs to be understood, and each needs to affiliate with it. The ultimate aim is a alliance between Man and God; with Man raised to the level of divine. Obedience is, at most, a phase en route to this ideal - a developmental means towards the end of grown-up virtue.
Meanwhile, obedience and surrender to God's will may be necessary at specific times and places - but if it is implied that this is the end as well as the means - then we are misrepresenting the whole divine creation, and making Christianity incoherent - or else implying that the creation is a botched job.
Such incoherence of argument has become very obvious to modern Men, so by over-emphasising obedience (perhaps on grounds of immediate expedience), the cause of Christianity may well be impaired.
This is one reason why theosis - the voluntary development of Men toward ultimate divinity - ought to be given a much greater, central, place in the primary description of Christianity (as it is in the Fourth Gospel).