How so?
4 And this gospel of the kingdom shall be preached in all the world for a witness unto all nations; and then shall the end come.
Not all religions (even abrahamic ones) have kingdoms. Not a lot are witnesses to "reach in all the world" a lot of which hate evangalism with a passion.
Since god isn't universal, not all people will have a belief in the christian god. It makes sense. The bible confirms what you already believe. It's not a criteria for everyone else.
How is god of scripture universal?
Yes, and then shall the end come. The end of all badness on Earth.
The executional words from Jesus' mouth will rid the Earth of the wicked as per Isaiah 11:3-4; Revelation 19:14-16
That is what will enable the humble meek people to inherit the Earth. Earth abides forever as per Ecclesiastes 1:4 B.
Mankind will see the return of the Genesis ' Tree of Life ' for the healing of earth's nations as per Revelation 22:2.
So, the 'Tree of Life' is for the benefit of ' healing ' and Not the end of Earth, or end of life on Earth.
If Earth is to be destroyed then there would be No need to pray the invitation of Revelation 22:20 for Jesus to come !
God promised father Abraham that ALL families of Earth will be blessed, and ALL nations of Earth will be blessed.
Blessed with the benefit of ' healing ' for earth's nations as described in Isaiah 35th chapter.
As the Kingdom of England and the Kingdom of Jordan are governments, so too God's Kingdom of Daniel 2:44 is a government.
A kingdom government in the hands of Christ Jesus for a thousand years - 1 Corinthians 15:24-26.
Jesus' ransom covers MANY according to Matthew 20:28, so the majority of mankind who have lived and died before Jesus can have the opportunity to believe in Jesus when they are resurrected back to life.- John 3:13.
In that way, the God of Scripture will be universal. Also, today the global proclaiming about Matthew 24:14; Acts 1:8 about God's kingdom of Daniel 2:44 has reached its ' final phase' , to so speak, because now people even in remote areas of Earth can have Scripture in their mother tongue or native languages.
Modern technology has made rapid Bible translation possible on a vast international scale as never before in history.