Disunity

And the enemy schemes to create division in our fellowship with other believers because he understands that division will discredit the love of Christ. Disunity in the body of Christ will cause people to doubt if Jesus really is who He said He is, the Son of God. Much of Jesus’s prayer in John 17 addresses His plea to the Father for the unity of believers with them (the Father and Son) and with one another (vv. 11, 21-23).
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I have given them the glory that you gave me, that they may be one as we are one—  I in them and you in me—so that they may be brought to complete unity. Then the world will know that you sent me and have loved them even as you have loved me.
John 17:22‭-‬23 NIV
https://bible.com/bible/111/jhn.17.22-23.NIV