Is Jamaica dangerous?

Im going to Jamaica in December with my family of 4. We are staying in Negril and venturing out daily. We want to visit all the towns like Montego Bay, Ocho Rios, Port Antonio and MAYBE Kingston since I've heard Kingston is dangerous. We rented a car so we could do it at our own pace. But I've been hearing so much about how its dangerous there. Can someone who has been there fill me in on the truth.