"Above all, love each other deeply, because love covers a multitude of sins" (1 Peter 4:8).
People can become like timid stray animals because they have been abused, used, or treated badly by others. When you love someone those sins that they have suffered at the hands of others are covered over by your love. This covering process can take a very long time which is why it requires deep love. This is why telling someone you've just met "I love you" or "Jesus loves you" can fall on deaf ears. It is not the word love or the concept of love that has lost its meaning. It is the giving of love that never lives up to people's accurate expectations. People know in their hearts what love is, they know how they would want to be loved. That is why Jesus' words still ring true, "treat others the way you would want to be treated." There is no mystery about how to love in those words.
Whether they realize it or not people are searching for God's kind of love. Only God & those who are constantly confident that God loves them can give people that kind of love. If you EVER doubt God's love for you then you are a broken or cracked pipe trying to deliver the living water of God's love to a thirsty world. If you do not trust the source you will not see a supply.
The root of the problem with the world is not that people lack love for one another, that problem begins at the branches. The root of the problem with the world is that people do not know or are not completely confident in God's immeasurably deep love for them.