(speaking as a man) I'm feeling cognitively dissonant.
I want to believe in Annihilationism https://en.wikipedia.org/wiki/Annihilationism. I want to believe scriptures such as Psalms 37:10 Psalms 37:20 Psalms 37:36 refer to the eternal state of sinful man rather than speaking only about life here on earth.
In Genesis 4:13 Cain cries out that his punishment is more than he can bear. The Lord alleviates his punishment by warding off those who would seek his life.
Revelation 22:15 occurs after creation of the New Heavens and Earth, and it states "but outside are dogs and sorcerers and sexually immoral and murderers and idolaters, and whoever loves and practices a lie." Why mention those outside the Kingdom in such a way as though they were still practicing these sinful habits after Death and Hell have been cast into the Lake of Fire?
As a child of God, those that hold contempt in their hearts toward my Lord Jesus Christ are my enemies Psalm 139:22. Though I believe it is in accordance with Matthew 5:44 and Luke 6:35 that we pray for them anyway. May God be merciful even to those wicked when they come before Him in judgement.
This is a big subject, and you have asked many questions. I will start with some basics:
1. The context of what you have asked about is as big as God, therefore, considering only part can only result in error. In the proper context, if one word from God is to be believed, they all are. You cannot pick and choose. Thus, if you are to believe any of it and call yourself a Christian (as you do), you have no choice but to believe every passage, even if you do not understand and have to take those points on faith. Life is short. You will know soon enough.
2. The word of God is delivered to us in two parts, one before and one after the Apex (whom is Christ, and the coming of the kingdom of heaven upon men). At which time Jesus announced the need for us to be born again of the spirit of God in order to enter the kingdom of God. Soon after, the apostle Paul explained that the former times pertained to the "
first Adam" and were of the natural man, and that the times following the Apex (the times of the Gentiles) pertain to the "
Last Adam, a life-giving spirit." Thus, this Apex marked the namesake of Jesus as the "Beginning" and the "End", and the transition from the natural to the spirit. Granted, this is a major stumbling block for people still born in the flesh and walking in it. Nonetheless, this is the truth from God, and the process.
In this truth (as Paul described), the natural or "old" man dies, and the "new" spiritual man lives. Which means, that as time goes on, all that is evil dies...which is that "
man of sin revealed" in the flesh, also spoken of by Paul. Thus, "
comes the end."
3. However, explaining this transition would not be complete without a full grasp and understanding of just what is meant by the "I am" nature of God. If we are "
born [again] of the spirit of God", the transition is from men of flesh existing on a created timeline that ends when the process is finished...to the timeless and eternal nature of God, which is "
the same yesterday, today, and forever." This is a huge transition that easily goes unrecognized for continuing to walk in the flesh and in the world. However, in the end - which begins when one is born again...no more does anything or anyone exist, who existed in that temporary timeline, but rather exists from that point on, for eternity, whether inside the kingdom or outside. In that day, regardless of being inside or outside, men will not say "I was" or "I will be", but all will say, "
I am." By this eternal reality of God, and in this way, "
every knee shall bow."
4. All of which God has done in His great mercy for those who were lost. Unfortunately, some prefer the natural and death, over the spiritual and life.