Ah, I knew there was an ulterior motive.
I make no secret of my disagreement with universal salvation and you make no secret of your agreement. However, I'll throw out a bone here because it's worth it for a constructive discussion.
It's just like the demons in Matthew 8:29 - that time of torment is coming. The is born out by the Greek word
basanizō. You know what's really curious about this word, though? It's root is
basanos, which the primary definition of this word is a touchstone used to test the purity of gold and/or silver. Basically you rub the stone against the metal and it tells you the purity. Jump back to basanizō. This remains the primary definition, although now it refers to the act. It's an excellent metaphor here because you have Christ (as the judge) standing before these demons and they're the ones who blurt it out.
See, it's like an unruly young child. They might do something mischievous or wrong, and then when the adult (parent, teacher, etc.) walks into the room and puts a little pressure on them, they come up and out with it. Jumping back to the purity reference, recall that our Father is the great refiner. He's effectively that stone that determines purity. It's not that the stone (God) wishes to destroy anyone or prove them impure - at the point of the comment only a single soul stands convicted and sentenced to destruction. It's that the demons prove themselves impure and they'll frankly be done away with at his coming because they don't have a leg to stand on in that righteous fire. It's not that the bad apples are bad; it's that they know better and yet still do it anyway. The devils believe, they know who the Son of God is but they'll continue right on to the time of basanizō, which will be torment for them fully of their own volition.