Why are Christians against united world?

Jesuit Futurism
On August 15, 1534, Ignatius Loyola founded a secret Catholic order called the Society of Jesus, also known as the Jesuits. "Jesuit priests have been known throughout history as the most wicked political arm of the Roman Catholic Church. Edmond Paris, in his scholarly work, The Secret History of the Jesuits, reveals and documents much of this information."3 At the Council of Trent, the Catholic Church gave the Jesuits the specific assignment of destroying Protestantism and bringing people back to the Mother Church. This was to be done not only through the Inquisition and torture, but also through theology.
At the Council of Trent, the Jesuits were commissioned by the Pope to develop a new interpretation of Scripture that would counteract the Protestant application of the Bible's antichrist prophecies to the Roman Catholic Church. Francisco Ribera (1537-1591), a brilliant Jesuit priest and doctor of theology from Spain, took on the challenge. Like Martin Luther, Ribera read the prophecies about the Antichrist, the little horn, the man of sin, and the beast. But he came to different conclusions than Luther did. He decided that the prophecies applied, not to the Roman Catholic Church, but to one diabolical figure at the end of time. This viewpoint quickly became the official Roman Catholic position on the Antichrist.
"In 1590, Ribera published a commentary on the Revelation as a counter-interpretation to the prevailing view among Protestants which identified the Papacy with the Antichrist. Ribera applied all of Revelation but the earliest chapters, to the end of time rather than to the history of the Church. Antichrist would be a single evil person who would be received by the Jews and would rebuild Jerusalem."4 "Ribera denied the Protestant Scriptural Antichrist (see 2 Thessalonians 2) as seated in the church of God—asserted by Augustine, Jerome, Luther and many reformers. He set on an infidel Antichrist, outside the church of God.”5 "The result of [Ribera's] work was a twisting and maligning of prophetic truth .”6

Jesus Christ

The holy brotherhood of right must stand united in the stirring conflicts of the hour. 24 No matter whether they be Jews, Samaritans, Assyrians, or Greeks, they must tramp down beneath their feet all strife, all discord, jealousy and hate, and demonstrate the brotherhood of man. 25 Then to the ruler of the synagogue he spoke: he said, United in the cause of right we stand; divided we will fall