The real test is this. Suppose one reads a story of filthy atrocities in the paper. Then suppose that something turns up suggesting that the story might not be quite true, or not quite as bad as it was made out. Is one's first feeling, "Thank God, even they aren't quite as bad as all that," or is it a feeling of disappointment, and even a determination to cling to the first story for the sheer pleasure of thinking your enemies as bad as possible? If it is the second then it is, I am afraid, the first step on a process which, if followed to the end, will make us into devils. You see, one is beginning to wish that black was a little blacker. If we give that wish its head, later on we shall wish to see grey as black, and then to see white itself as black. Finally, we shall insist on seeing everything - God and our friends and ourselves included - as bad, and not be able to stop doing it; we shall be fixed for ever in a universe of pure hatred.

C.S. Lewis, Mere Christianity.

Most people in the original twitter comments need to stop and think about that, but they may well be too far gone already.