We are called to love one another. Jesus says this is how men will know we are His disciples.
“By this all men will know that you are My disciples, if you have love for one another.” John 13:35
The two greatest commandments He says (paraphrasing) are to love God with everything and love everyone else as ourselves. No one does either. We disobey God showing we can’t love Him as He commands and hence we can’t truly love neighbor. But Jesus fulfilled this and by His love we can love.
Repent and believe the good news.