Of course many of them have a very narrow and literalist view of the document; much like many of the same people have a very narrow and literalist view of scripture. Just as the Bible, in their mind, is an eternal document and must be followed with wooden and a-contextual literalism, so too the constitution must be read as carved in stone, exhaustive, and eternal.
I encourage those of us who don't share Bush's dismissal or the Tea-Baggers fundamentalism to actually reflect on our constitution today. Think about it deeply, carefully, and critically.
If we do not examine it carefully, we sacrifice our founding document to the constitutional idolatry of the Tea-baggers. And just as we should not sacrifice the Bible to the wacko fundamentalists who worship it, as if paper and ink were their God, we must not allow the Constitution to suffer such a fate either.
Postscript: Here is a little info on Constitution Day