Political junkie that I am, I had to respond.
I can see the point of this argument, so I'm upmodding it. The Constitution was meant to be a "living document," one that was constantly challenged and updated to reflect modern issues not yet considered by the Founders. Right now we have 27 Amendments, addressing various aspects of our government and society. They appear to have passed at semi-regular intervals, indicating that the Constitution has, in fact, served as the "living document" the Founders intended.
When you consider a "fundamentalist," you are commonly discussing someone who is a literalist to a religious degree, someone who believes a body of text (usually religious) to be infallible and not to be challenged. The Constitution is anything but a holy text, but to some people it may well be.
Certain conservatives and libertarians seem to believe that the Federal Government is de facto prevented from governing outside the limited language of the Constitution. If the Constitution didn't explicitly allow the government to assume a particular role, then the government is automatically prevented from doing so. To them, the States have all power to pass laws and assume various roles, and all the Federal government can do is decide on matters of interstate commerce and national security.
To some liberals, the Federal Government is the final source of central power and the best resource for change on a national level. The lawmaking powers of Congress were meant to be able to impact the nation regardless of individual State wishes, so long as they phrase those laws within the confines of the Constitution. It was a liberal ideal that was enacted within the first section of the Fourteenth Amendment which states:
All persons born or naturalized in the United States and subject to the jurisdiction thereof, are citizens of the United States and of the State wherein they reside. No State shall make or enforce any law which shall abridge the privileges or immunities of citizens of the United States; nor shall any State deprive any person of life, liberty, or property, without due process of law; nor deny to any person within its jurisdiction the equal protection of the laws.
Thus beginning the age wherein the Bill of Rights are expressly applied to the States as well as the Federal government. Effectively, the Fourteenth began the Federal Government's tenure as a lawmaking body that supersedes State legislatures.
In effect, "fundamentalist constitutionalists" are fighting against the Constitution itself, or at least the interpretation of the part of the Constitution that was ratified after the Civil War. The writers of the Fourteenth Amendment realized that States could get away with all manner of atrocities in the name of sovereignty, and they used the Constitution to close that loophole. In time, people stopped appealing as much to State legislatures as to the Federal legislature to protect new rights and assume new services to reflect the changing times. This left the States with little more than maintenance, and to experiment with laws more radical (like California) than those imposed by the Federal Government.