Anyone who believes - I mean truly believes - in the global diktat of "none are safe until all are safe" is spiritually dead. And that's exactly what the demonic powers are aiming for - a world of mass spiritual death in which every single soul has been "safely" damned.
From a demonic perspective spiritually dead people are "safe" in the sense that they have been effectively neutralized in the spiritual war.
"Safe" people pose no threat to the demons. Moreover, "safe" people make effective accessories in the assault against God and Creation.
Most significantly, "safe" people allow the demons to increase efforts against the unsafe and the dangerous - those troublesome individuals who continue to reject being safe in favor of being saved.