We pray because there is always good in this world, even if its only a tiny spec. God came and saved us from very wicked ways, he really didn't have to. We walk like him caring for others in need... as he said, he came for those that need.
Mathew 9:13 is a great example as he speaks to the Pharisees
"But go and learn what this means: 'I desire mercy, not sacrifice.' For I have not come to call the righteous, but sinners."
I hope it makes sense what i am trying to say. Keep those in need in your prayers, even those that call them selves our enemies, or us their enemies.
God Bless friend