Well, my emphasis was that the parable implies on the who - that Jesus commands the slaying - and not a focus on the nature of the slaying.
This is because Jesus is the Lord of all and King of Kings, and > all judgment has been committed to Jesus >
"'For the Father judges no one, but has committed all judgment to the Son, that all should honor the Son just as they honor the Father.'" (in John 5:22-23)
You were also talking about if God loves if Jesus is commanding the slaying of people. Well, now is the time when anyone may come to Jesus and trust in Him for salvation and enjoy sharing with God in His own love. But there are anti-love people who refuse Jesus, and even make their own selves the judges of God's own Son. This is not wise, since "all judgment has been committed to the Son", by God our Heavenly Father.
Jesus has been so humble, that He has left Heaven itself in order to come to us and reach us and save us from our sin with all our love-dead pleasure seeking and fearing and hurting and suffering. Jesus first is about saving anyone who wants love's salvation. But if people refuse this . . . even though they already have suffered in their own sin's misery and destruction, still they will be judged; their own wrong's suffering can not deliver them from being properly punished.
They already are love-dead, but even though they are dead, they will still be slain, whatever Jesus knows this will mean. And after one dies, however, one is still conscious. It is part of the process of moving evil people to the lake of fire and brimstone which will be needed to contain them so they are not trying to mess with people who are loving and enjoying God as family with one another.
By the way > Revelation 14:9-11 > if a person worships Satan's beast and takes Satan's mark > the person "shall be tormented with fire and brimstone in the presence of" the Lamb and His holy angels. So, yes there will be brimstone and not only slaying. A thing, though, about this, is how Jesus the Lamb and His angels won't feel any torment of the brimstone. Because Jesus and the Lamb and we His children have the nature of love so we can not be tormented by the brimstone.
But while I was trying to use women, I have felt the brimstone in myself, possibly; it is the most horrible experience I ever have had or imagined having, I would say. You do not want to play games with this. But it was against how I was being anti-love, being willing to just use a woman instead of tenderly caring for her in God's love and appreciating and honoring her as a person of Jesus.
So, the nature of the person determines if he or she can be effected by the torment of the brimstone, or can be slain > we in God's love are alive with His own almighty power so we can not die. Our bodies can die, but we stay alive spiritually.
And so those who shall be slain will be already love-dead, anyway. They have refused the eternal life of Jesus, already. So, having them slain is simply continuing what they have started for themselves. But it gets worse, which is true of how things become because of unloving and selfish living (2 Timothy 3:13). So, Jesus will be doing what needs to be done, to keep Satan and his evil spirit and beings where they will belong.
You seem to be questioning if Jesus is loving; so this is why I am getting into this, in detail. Hell and slaying the wicked is included in the process of God loving those who desire Him for Himself and who seek all which is good; Satan and his beings need to be so processed away from us, in order that our attention can be fully with God and loving, and our attention will not keep on being involved with Satan and dealing with his nasty filth and the fallen beings who are vessels (Romans 9:21) of his "spirit who now works in the sons of disobedience." (in Ephesians 2:2) Jesus in His judging will be moving and processing Satan and his spirit and his fellow beings to the flaming sewer which burns with fire and brimstone. So, doing this practical and needed thing is not unloving.
And yes Jesus will be involved in this judging, because God our Heavenly Father has committed all judgment to Jesus His own Son > John 5:21-23 < and this scripture says that not only does Jesus judge, but Jesus "gives life". This includes how love is alive in us.
However, Satan has been right in the presence of Jesus, and he did not appreciate the One so beautifully wonderful and loving and kind like Jesus is . . . also humble and gentle and "life-giving" (in 1 Corinthians 15:45). And humans of Satan . . . both certain Jews and certain but not all Roman Gentiles were right in the presence of Jesus, and they hated Him and tortured and murdered Jesus God's own Son. So, yes Jesus will process them differently in judgment, unless anyone changes to trust in Christ (Ephesians 1:12) who is our Messiah.