Summary: Psalms 2 & 3 show us that God is in charge no matter how the human default condition of rebellion tries to get in the way. They also show us that when faced with difficulty there are four things we do naturally that make our troubles worse, and four ways
Our world today is moving faster and faster away from faith in God. In fact, the very existence of God is regularly called into question. In every part of our culture you are marked as narrow-minded, ignorant, uncool, hateful, bigoted, and foolish for trusting in Jesus Christ as your Savior. It’s nothing new, of course. Ever since the rebellion in the Garden of Eden, mankind has been in rebellion against God and His rule.
Psalm 2 (quickview)  is a royal Psalm that Peter and John ascribe to David (Acts 4:25 (quickview) ). It looks forward to a day when God’s rule once again fully and visibly extends to planet Earth with the coronation of Jesus Christ.
It is also a Messianic Psalm as it talks about God’s Anointed One, the Messiah. It also shows us individually the folly of going our own way and realizing that this is the default behavior of the human heart, something we’ve got to fight constantly.
The question is rhetorical. In light of God’s sovereignty it is surprising that anyone would rebel against His authority, yet they do—why? Because the spirit of rebellion was planted in the human heart by Lucifer who wanted to be greater than God.
Isaiah 14:12-15 (quickview)  "How you are fallen from heaven, O Lucifer, son of the morning! How you are cut down to the ground, You who weakened the nations! 13 For you have said in your heart:
'I will ascend into heaven, I will exalt my throne above the stars of God; I will also sit on the mount of the congregation On the farthest sides of the north; 14 I will ascend above the heights of the clouds, I will be like the Most High.' 15 Yet you shall be brought down to Sheol, To the lowest depths of the Pit.” NKJV
People plan on how they can do their own thing without God in the picture, but it is in vain because God is in ultimate control and will return to assert that control in a very real way.
2 - 3
Verse 2 is a parallel to verse one but provides a little more detail—the rebellion of verse 1 is “taking their stand.” It’s like that old saying “drawing a line in the sand.” This age, with more and more pride, declares that “we don’t need God.” The “plotting” of verse 1 becomes “conspiring together against the Lord.” As we see this age grow closer to the end times we will see this type of conspiring not only of individuals and individual nations, but of nations collaborating together against God. See Revelation 17 (quickview) , and 11:7-10 (the two witnesses).
But notice that it isn’t now just a rebellion against Yahweh but against “His Anointed One.” This is the Hebrew word mashiyach from which we get the word Messiah. Here, the Messiah is God’s chosen King. In the end, all rebellion against God is going to be rebellion against Jesus Christ (Christ is from the Greek christos which also means “anointed one”).
People who are in rebellion against Jesus see a relationship with Him as restraining and “chains.” The reason is that this rebellion we hold onto makes us think that we are “free” but in reality we simply become slaves to Lucifer.