If Christ died on the cross for all of humanity

This a typical question coming from an atheist having a wrong impression and not understanding the Holy Bible.

 So let me help clear up this misconception of yours that I'm sure others share as well. This misunderstanding happens when you have not read the Holy Bible and have no knowledge of what it is all about and so you form misconceptions.

The Old Testament lays the foundation for the teachings and events found in the New Testament. The Bible is a progressive revelation.

Try skipping the first half of any book that you read, you will no doubt have a hard time understanding the characters, the plot, and the ending.

In the same way, the New Testament is only completely understood when it is seen as a fulfillment of the events, characters, laws, sacrificial system, covenants, and promises of the Old Testament.

If we only had the New Testament, we would come to the gospels and not know why the person were looking for a Messiah (a Savior King).

Without the Old Testament, we would not understand why this Messiah was coming (see Isaiah 53), and we would not have been able to identify Jesus of Nazareth as the Messiah through the many detailed prophecies that were given concerning Him, e.g., His birthplace (Micah 5:2); His manner of death (Psalm 22, especially vv. 1, 7-8, 14-18; Psalm 69:21), His resurrection (Psalm 16:10), and many more details of His ministry ( Isaiah 52:19, 9:2).

The New Testament Gospels and the Acts of the apostles record many of the fulfillments of prophecies that were recorded hundreds of years earlier in the Old Testament.

 In the circumstances of Jesus' birth, life, miracles, death, and resurrection as found in the Gospels, we find the fulfillment of the Old Testament prophecies that relate to the Messiah's first coming.

In summary, the Old Testament lays the foundation for, and was meant to prepare the Israelites for, the coming of the Messiah who would sacrifice Himself for the sins of the whole world (1 John 2:2).

Both testaments reveal the same holy, merciful, and righteous God who must condemn sin but who desires to bring to Himself a fallen human race of sinners through the forgiveness only possible through Christ's atoning sacrifice.

 In both testaments, God reveals Himself to us and how we are to come to Him through Jesus Christ. In both testaments, we find all we need for eternal life and godly living (2 Timothy 3:15-17).