"But those my enemies, who would not that I should reign over them, bring here, and slay them before me."
It may be helpful to place this in context. I mean broad biblical context. Jesus is the one who told us to love our enemies. He is the one who while dying from torture on the cross, with the sin of the world also placed upon Him, said, "Father, forgive them; they know not what they do". He is the prototypical lover of the unlovely.
No matter what has been done to you, no matter what you've done, Jesus loves you truly and will receive you to Himself. He will protect you and give you abundant and eternal life. He has already born the weight of your affliction, and He will walk with you and give you victory over it.
We are even given a graphic example of this in real life, in Paul the apostle. He zealously persecuted the early church even unto death. His hatred of Jesus, whom he considered a misleader of the nation, must have been immense. But Jesus overruled his misconceptions and revealed Himself to him, and Paul was instantly changed. Instantly. His first words were, "Who are you, Lord?" Paul explains why He was shown mercy:
formerly I was a blasphemer, persecutor, and insolent opponent. But I received mercy because I had acted ignorantly in unbelief,
and the grace of our Lord overflowed for me with the faith and love that are in Christ Jesus.
The saying is trustworthy and deserving of full acceptance, that Christ Jesus came into the world to save sinners, of whom I am the foremost.
But I received mercy for this reason, that in me, as the foremost, Jesus Christ might display his perfect patience as an example to those who were to believe in him for eternal life. -1Tim 1:13-16
There were two reasons. Paul's heinous actions were done sincerely. He thought he was serving God. He thought he was defending truth and doing right. He was acting on wrong information, and that needed to be corrected. Once it was, he put the same zeal into serving the true living God of love.
Secondly, God wanted to make an example of Paul, for people like you and me, so that we would know that no matter how low we have sunk in life, how much we have offended God, the love that the Father poured out on the world through Christ is far, far stronger still. There is no sin that will keep us from God, now that Christ has opened the way back to Him, as long as we are willing. "
Whosoever will".
But the men in this parable were hardened despite accurately knowing their noble rightful ruler. They were not operating under a misunderstanding. They knew what they were doing, and even prayed ("sent a delegation after him") not to have the nobleman's rule. They knowingly and willingly hated their rightful ruler. For those, there will be consequences appropriate to their actions.
To men judging the exterior, all opposition can look the same. But the Lord looks on the heart and sees the motivation. Some of His most intimate saints were once His most ardent enemies, but the Lord turned the cheek and walked the second mile and turned them to Himself. This happens still today, when even Muslim terrorists are coming to the Lord in droves. And it can happen with you. You have your truest friend in Jesus. Let Him love you. He dearly wants to, as He showed on the Cross.