Short answer: Generally, yes, individual rights trump mob rule.
Long Answer: Individual rights are subject to common law restrictions. You cannot yell fire in the crowded movie house. You cannot bear arms on my property if I decide not to allow it. You cannot require others to endure an unreasonable risk of injury or death in order for you to excercise a right. NBC weapons are "arms", but if you keep them in your basement, you are creating an unreasonable risk to everyone else and your "right to keep and bear arms" is trumped by this.
Since those wise men who wrote the Constitution could not have forseen the development of weapons of mass destruction, they made no provision for dealing with them.
I think they are an excellent place to draw the line as far as personal ownership of weapons.