We must love other Christians.
Cain destroyed his brother Abel when God accepted Abel's offering & not Cain's (Genesis 4:1-16). People who are morally upright expose & shame those who aren't. If we live for God, the world will often hate us because we make them painfully aware of their immoral way of living.
John echoes Jesus' words that one who hates another person is a destroyer at heart (Matthew 5:21,22). Christianity is a religion of the heart; outward compliance alone is not you is an evil cancer within you & will eventually destroy you. Don't let a "root of bitterness" (Hebrews 12:15) grow in you or your church.
Real love is an action, not a feeling. Sometimes it is easier to say we'll die for others than to truly live for them, which involves putting others' desires first.
Christians must show their love, & one way to do that is to provide money or material possession to help others' needs. How clearly do your actions say you really love others?
Reference summary used from the Life Application Bible KJV, Tyndale House Publishers, Inc., Wheaton, Illinois