That is why it was called Babel,* because there the LORD confused the speech of all the world. From there the LORD scattered them over all the earth."
…so God is also a divider.
But notice that the dividing is their punishment for their pagan pride.
CHRIST CALLS FOR UNITY
“Neither pray I for these alone, but for them also which shall believe on me through their word, that they all may be one; as thou, Father, art in me, and I in thee, that they also may be one in us; that the world may believe that thou has sent me.” - John 17:20-21
“Other sheep I have, which are not of this fold: them also I must bring, and they shall hear my voice; and there shall be one flock, one shepherd.” (John 10:16).
Paul calls for unity:
“For it has been reported to me about you, my brothers, by Chloe’s people, that there are rivalries among you. I mean that each of you is saying, “I belong to Paul,” or “I belong to Apollos,” or “I belong to Cephas,” or “I belong to Christ.” Is Christ divided? Was Paul crucified for you? Or were you baptized in the name of Paul? I give thanks (to God) that I baptized none of you except Crispus and Gaius, so that no one can say you were baptized in my name.” 1 Corinthians. 1:11-15
“May the God of endurance and encouragement grant you to think in harmony with one another, in keeping with Christ Jesus, that with one accord you may with one voice glorify the God and Father of our Lord Jesus Christ.”
Romans 15:5-6
“I urge you, brothers, in the name of our Lord Jesus Christ, that all of you agree in what you say, and that there be no divisions among you, but that you be united in the same mind and in the same purpose.” 1 Corinthians 1:10
“I, then, a prisoner for the Lord, urge you to live in a manner worthy of the call you have received, with all humility and gentleness, with patience, bearing with one another through love, a striving to preserve the unity of the spirit through the bond of peace: one body and one Spirit, as you were also called to the one hope of your call; one Lord, one faith, one baptism; one God and Father of all, who is over all and through all and in all.” Ephesians 4:1-5
“Only conduct yourselves in a way worthy of the gospel of Christ, so that, whether I come and see you or am absent, I may hear news of you, that you are standing firm in one spirit, with one mind struggling together for the faith of the gospel.” Philippians 1:27
*How Protestantism Divides Itself
Two tiny Protestant communities in a small town in Canada were getting on quite fine. They were of different sects, but they communicated well together and shared certain charitable chores in the town. Eventually they decided to look into things, see if they could unite and form one church. They went back to the Bible, to see what that said. They studied the fathers, to see what they had to say. They prayed and held services in the hopes of achieving unity. Eventually they acted on their conclusions.
There are now three Protestant communities in that small Canadian town!*