Psalm 102:15 So the heathen shall fear the name of the Lord, and all the kings of the earth thy glory.
All unbelievers will fear the name and the glory of the Lord. The response of “fear” here is used in the sense of really being afraid, not in the sense of belief. The almighty majesty and awesome power of God instills fright in the sinner when confronted with His glory. The sinner cannot stand before the holiness and righteous judgment of God.
He will be brought to his knees in the face of His revealed power and glory, forced to recognize His majesty and crumble before the just judgment of God upon his sin In fact, when Jesus appears in glory to all the earth at the end of the age, every knee shall bow, whether on the earth or under the earth or in heaven, at the name of Jesus, and confess that He is Lord [Philippians 2:10-11]. The believer will bow gladly and willingly; the unbeliever will bow grudgingly and unwillingly, with gnashing of teeth regretting that they did not fear (believe) God when they could have.
Jesus Christ will have His worship as Lord one way or another from all Creation. So it would certainly be a good idea to fear, love and worship the Lord now when we hear the Gospel of grace and forgiveness. Fearing God leads to loving God when we hear that He first loved us.