Property is your bit of control over the physical world. When you possess it you possess all rights to it which allows you to manipulate it anyway you want. From these basic right of property you direct its use by your thoughts which are naturally free and when you lose the right to do with your property as you want you lose that control over your existence. What you want to do is now subject to the community's will which is deprives you of your individual control of your own existence. Now you might say that you can have all the freedom you want without controlling property but how so? When the government can tell you what cloths to wear, what car to drive, what color to paint your house, how many hours a day you can use the computer then what meaningful freedom do you have? You have the freedom of thought but no way to make it happen so your free-will is being denied to you simply because you can't control your piece of the physical world.