The WDW property is twice the size of Manhattan with over 100,000 people on property every day or more, and how many attacks have happened over the past year. Just a few. The big robbery the other day which was tragic, but anytime you have that many people on a property its bound to happen sooner or later. Then the weird fight at the teacups, and the people who got arrested from New Jersey.
That's like 4 bad apples out of 100s of thousands. You're safer at a Disney Resort than you are sitting in your home right now.