Agreed, thanks !To confess one as their lord is an explicit confession of obedience. Demons are not obedient, nor are those who claim Christ as their lord when they're practicing lawlessness. This is why Christ can say he never knew them. Saying one is your lord doesn't make him your lord. Following his commands is what makes him your lord.
But you do know the demons obey Jesus command to come out of the person they possessed right on many occasions in the gospels ?