Obviously you think you would be safe if no one has guns. Obviously you are not thinking at all.
Assume you liberals are successful in taking all guns out of everyone's hands. What would you use to defend your family when criminals break into your house with knifes? Do you think you would have any chance? Think again.
Even if you are good at marshal arts, you'll have days when you are old and weak. Your only chance to defend yourself is your right to own guns.