Every nation has a redemptive destiny, and the Lord is urging us to ask Him for the nations as an inheritance (Psalm 2:8).
Johnny Enlow. The Seven Mountain Prophecy (p. 26). Kindle Edition.
Sadly, Enlow's mistake here is quite the popular one. In my time with YWAM, it was quite common for someone in prayer to use this bit from Psalm, "Ask of me, and I will give you the nations", and to ask for some nation or another themselves. In their understand, and in that of Enlow, it is us who are being addressed in the Psalm, we who are suppose to ask for the nations, and they will be given to us as an inheritance.
So, let's look at this verse in context.
ps.2.1 Why do the heathen rage, and the people imagine a vain thing?† ps.2.2 The kings of the earth set themselves, and the rulers take counsel together, against the LORD, and against his anointed, saying, ps.2.3 Let us break their bands asunder, and cast away their cords from us. ps.2.4 He that sitteth in the heavens shall laugh: the Lord shall have them in derision. ps.2.5 Then shall he speak unto them in his wrath, and vex them in his sore displeasure.† ps.2.6 Yet have I set my king upon my holy hill of Zion.† ps.2.7 I will declare the decree: the LORD hath said unto me, Thou art my Son; this day have I begotten thee.† ps.2.8 Ask of me, and I shall give thee the heathen for thine inheritance, and the uttermost parts of the earth for thy possession. ps.2.9 Thou shalt break them with a rod of iron; thou shalt dash them in pieces like a potter's vessel. ps.2.10 Be wise now therefore, O ye kings: be instructed, ye judges of the earth. ps.2.11 Serve the LORD with fear, and rejoice with trembling. ps.2.12 Kiss the Son, lest he be angry, and ye perish from the way, when his wrath is kindled but a little. Blessed are all they that put their trust in him.
Brown, David; Fausset, A. R.; Jamieson, Robert (2011-06-02). Jamieson, Fausset, and Brown's Commentary on the Whole Bible (best navigation with Direct Verse Jump) (Kindle Locations 136830-136847). OSNOVA. Kindle Edition.
Look at the verse before 8, v 7, " I will declare the decree: the LORD hath said unto me, Thou art my Son; this day have I begotten thee." This is obviously a messianic statement, the Lord is speaking to His Son, Christ. Once that is established, we can see when He says to someone "Ask of me, and I shall give thee the heathen for thine inheritance, and the uttermost parts of the earth for thy possession", He is still speaking to Christ.
God wasn't and isn't speaking to us in this Psalm. We can learn from it, yes, but let's not pretend that simply because v. 8 has an implied "you" in it that that "you" means, well, you.
It doesn't. You weren't there, the church hadn't even yet been formed, and the Psalms were written several hundreds of years before Pentacost. God is not urging us to ask for the nations as an inheritance, that's just arrogance to even think He would. This Psalm is about Christ, not us.