If someone is dedicated to stealing a Jeep or stealing something from it, there is nothing that we can do about it. I watched a show awhile back in which the network paid an ex-thief to show how easy it is to break into a car. He did a few just to show it wasn't something special about one particular car that let him do what he did. It took him 11 seconds to cut the steering wheel, and less than 40 seconds total from the time he first touched the outside of the car until he had the vehicle started and drivable with the club off. He also said car alarms that don't have ignition diasable features don't work because everyone just ignores alarms as an annoying sound these days.
Jeeps are very easy to break into, especially with a soft top.
And then consider leaving it unlocked. It took me a long time to get used to the idea of someone just helping themselves to the inside of my car, which I knew was happening every other week or so by the occassional beer bottle or cigarette butt that was left in there. Ah, but you can do some things that may deter the casual criminal. The Disabler Switch. If you don't have a second tank a straight thru valve would work fine to shut off flow.