Look, if he says he created calamity, I believe him. Can evil exist without his permission? Can evil do anything that he doesn’t know about? Is evil greater than God? No. God is in charge of ALL things, because he CREATED all things. I have no problem with him creating evil, because it suits his purposes, which we cannot fathom. I have faith that he uses evil for our betterment. I have faith that He is in control of evil, and not the other way around.
Why then do you suppose that calamity is mentioned 75 times in the Old testament, but not once in the New Testament?