I guess you are asking this: Why is the third law correct if the container makes to the table a force of 1000 kg but the table reacts with a smaller force? The error is that 1000 kg is the weight of the container, not the force it will do to the table. If the table doesn’t break, when they are at rest, it will make a force of 1000 kg to the table and the table a force of 1000 kg back (called the normal force). But if the table doesn’t resist and breaks under a force above 10 kg, then the container will make on the table a force of 10 kg, not 1000 kg. A force is an interaction between two objects. You cannot have a "force" of 1000 kg with you and apply it onto any object you want by touching it. It doesn’t work like that.