The existence of evil and suffering in a world that was created and is under the control of a GOOD and LOVING God - those things make little sense to many people - especially unbelievers. But many Christians struggle with this issue as well - particularly when tragedy, suffering or evil impact them or those they are close to. It's an important question to ponder.
Here, Dr. William Lane Craig addresses the problems the co-existence of evil / suffering and a loving God:
https://www.bethinking.org/suffering/t ... em-of-evil