Maybe - just maybe there aren't more of these sorts of people as your describe, or more murderers, rapists, or even general assaults etc. Maybe, due to technology, you just get to hear more about more of them, from further afield, coupled with that information being available faster than ever!
Remember just 15 years ago where if a neighbour didn't tell you, or the local paper didn't print it, you never knew unless it made TV news?!
We are reminded by this that wrong surrounds us and it is through our witness of the gospel that such people can be saved through Christ. The world isn't filled with more of them, the challenge Christ set us is just as hard as when the Disciples left that upper room.
Don't think down, think up, pray for strength, inspiration and try to show witness through you life and actions.
"Be strong and courageous. Do not be afraid or terrified because of them, for the LORD your God goes with you; he will never leave you nor forsake you.”
Deuteronomy 31:6