Life's not just about loving your brother and sister, we can always say we are only human, but in luke, Jesus says it differently, Children of the most high, are ones that love their enemies, just as the Father, loved those who were ungreatful and full of sin. I don't think this verse is telling us to stop loving our brothers, but more of, we should stop critizing those who are not of the Church, and start showing them, that we truly are loved by God, and love them the same:)

Luke 6:27-37 (New Century Version)

²⁷ "But I say to you who are listening, love your enemies. Do good to those who hate you, ²⁸ bless those who curse you, pray for those who are cruel to you.²⁹ If anyone slaps you on one cheek, offer him the other cheek, too. If someone takes your coat, do not stop him from taking your shirt.³⁰ Give to everyone who asks you, and when someone takes something that is yours, don't ask for it back.³¹ Do to others what you would want them to do to you.³² If you love only the people who love you, what praise should you get? Even sinners love the people who love them.³³ If you do good only to those who do good to you, what praise should you get? Even sinners do that!³⁴ If you lend things to people, always hoping to get something back, what praise should you get? Even sinners lend to other sinners so that they can get back the same amount!³⁵ But love your enemies, do good to them, and lend to them without hoping to get anything back. Then you will have a great reward, and you will be children of the Most High God, because he is kind even to people who are ungrateful and full of sin. ³⁶ Show mercy, just as your Father shows mercy.

Just another version for you to get another pic of this verse:

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Luke 6:27-37 (NRS) "But I say to you that listen, Love your enemies, do good to those who hate you, bless those who curse you, pray for those who abuse you... Do to others as you would have them do to you. If you love those who love you, what credit is that to you? For even sinners love those who love them. If you do good to those who do good to you, what credit is that to you? For even sinners do the same... But love your enemies, do good... and your reward will be great, and you will be children of the Most High; for he is kind to the ungrateful and the wicked. Be merciful, just as your Father is merciful... Forgive, and you will be forgiven."