Factions have agendas and vested interests in misinterpreting the Constitution. Including (and especially) State, local, and even the federal governments. A great many unconstitutional laws are passed and remain on the books until ruled unconstitutional by the Supreme Court which is the final arbiter except for the People. The only thing that changes the Constitution is the amendment process which is difficult and rare. Supreme court decisions are also frequently misinterpreted. I don't recall any amendments being passed since 1980 and if that is the case the Constitution reads exactly the same now as it did then.