Well, as Christians we shouldn't be surprised at how humanity is acting towards humanity, because this is prophecy coming to pass before our very eyes.
This was prophesied in 2 Timothy 3: 1 onwards.
We are living in the last days now, and scripture tell us to KNOW that in the last days perilous times will come for men will be lovers OF THEMSELVES, lovers of money, boasters, proud, blasphemous, disobedient to parents, unthankful, unholy, unloving, unforgiving, slanderers without self control, brutal, despisers of good, traitors, headstrong, haughty, lovers of pleasure rather than lovers of God, having a form of godliness, but denying its power and we are told, FROM SUCH PEOPLE TURN AWAY.
So if you didn't realize this was prophecy coming to pass in the final days, you might begin to lose faith in humanity.
As it is, as Christians, we need not lose faith in God/Christ/Holy Spirit and Christians because we have already read the end of the book and we win!
So take heart dear one. The hope of the Church is the resurrection of the dead, and that means we spend eternity in heaven with our Lord. After all, this earth's duration is short when compared with eternity