This is true. This does not mean there has to be a civil war, or that this would lead to one. If the SCOTUS does not hear the case or rules against it. A precedent will be set that states can do what ever they want (create their own currency and block commerce from other states). Over time more and more states will start making unconstitutional laws. The union will slowly die from the inside.
The way I read it is they want to add 26 to the current 9.