maybe quote these scriptures,
1 JOHN 4:19 We love because he first loved us. 20 If anyone says, "I love God," but hates his brother, he is a liar; for whoever does not love a brother whom he has seen cannot love God whom he has not seen. 21 This is the commandment we have from him: whoever loves God must also love his brother.
JAMES 4:11 Do not speak evil of one another, brothers. Whoever speaks evil of a brother or judges his brother speaks evil of the law and judges the law. If you judge the law, you are not a doer of the law but a judge. 12 There is one lawgiver and judge who is able to save or to destroy. Who then are you to judge your neighbor?
1 PETER 3:8 Finally, all of you, be of one mind, sympathetic, loving toward one another, compassionate, humble. 9 Do not return evil for evil, or insult for insult; but, on the contrary, a blessing, because to this you were called, that you might inherit a blessing. 10 For: "Whoever would love life and see good days must keep the tongue from evil and the lips from speaking deceit, 11 must turn from evil and do good, seek peace and follow after it..."