Christians get very angry toward other Christians who sin differently than they do.
We tend to think, 'Life should be fair because God is fair.' But God is not life. And if I confuse God with the physical reality of life - by expecting constant good health for example- then I set myself up for crashing disappointment.
The presence of another caring person doubles the amount of pain a person can endure.
Whatever else it is, the kingdom of God is decidedly not a call to violent revolution.