Although certain people will ridicule the idea that the Lord Jesus Christ is going to come back, the reason why he has not yet come back to judge people is that God is being patient with people; but Jesus will certainly come back and judge people.

2 Peter 3:3-10

3 It is important for you to understand that in the time immediately before Christ comes back, there will be people who will ridicule the idea of his coming back. Those people will do whatever evil things they wish to do. 4 They will say, “Although it was promised that Christ will come back, ◄nothing has happened that would indicate that he is coming back./what happened to the promise that he is coming back?► [RHQ] We say that because ever since the Christian leaders who lived long ago died [EUP], everything has remained the same. Things are as they always have been since God created the world!” 5 They will say that because they ◄deliberately overlook the fact/have decided to ignore what they know► that God, by commanding long ago that it should be so, caused the heavens to exist, and he caused the earth to appear out of water and to be separate from the water. 6 And God, by commanding that it should be so, later destroyed the world that existed at that time, by causing the earth to be flooded with water {water to flood the earth}. 7 Furthermore, God, commanded that the heavens and the earth that exist now remain until the time when he will judge ◄ungodly people/people whose lives are not pleasing to him►. And at that time he will destroy the heavens and the earth by burning them. 8 Dear friends, I want you to understand well that the Lord God is willing to wait a long time to judge the people in the world! How much time passes before the Lord God judges the people in the world does not matter to him! He considers that one day passes no more quickly than 1,000 years, and he also considers that 1,000 years pass as quickly as one day passes to us! 9 Therefore, you should not think that because Christ has not yet come back to judge people, the Lord God is ◄delaying/slow to do► what he promised. Some people think that this is so, and they say that Christ will never come back. But you should understand that the reason why Christ has not yet come back to judge people is that God is being patient with you, because he does not want anyone to be lost eternally. Instead, he wants everyone to turn away from their sinful behavior. 10 Although God is being patient, at the time [MTY] that he has chosen, the Lord Jesus Christ will certainly come back to judge people. He will come back unexpectedly, like a thief [SIM] comes unexpectedly. At that time there will be a great roaring sound. The heavens will cease to exist. ◄The elements/The parts of which the universe consists► will be destroyed by fire, and the earth that God made and everything on it that people have made will disappear (OR, will be burned up).