I do not disspute that changes have taken place. But your use of the facts of change to then claim that a given action by the government or the states is only unconstitutional when SCOTUS says so is pure BS. It is unconstitutional because the CONSTITUTION says so. If the courts do not uphold what the Constitution says (which has happened many times in our history), then they are derelict in their duties. But that does not make what the Constitution says different, it simply means the courts got it wrong.
The courts ALWAYS uphold what they interpret the Constitution to say. I can't think of one singe example where the Majority Opinion admitted it did not uphold the Constitution, yet the Court ruled in favor of it! Every decision they make, whether YOU personally agree with it or not, is made on the basis of Constitutionality. How that court interpreted Constitutionality.
The Constitution does SAY what the Constitution SAYS, I have not disputed that or claimed it not to be the case. However, our
understanding of what it says, has changed with the times. Clearly, the 4th Amendment protects us against illegal searches and seizures, but did this apply to the Native Americans? They had their lands stolen and were marched to reservations. Seems to me, if it was so clear what the Constitution said, that wouldn't have happened, someone (like you) would have stood up and said... hey guys, we can't do this because the Constitution prohibits it! But that didn't happen, obviously. When Lincoln suspended Habeas Corpus, or FDR interned Japanese-Americans, where were the Constitutional scholars pointing out that our Constitution said they couldn't do that? Seems if it were so clear the Constitution forbade this, it wouldn't have happened, because someone would have stepped forward and said... uhm, sorry, against the Constitution... can't do it! But that did not happen!
You seem to be claiming the absurd while calling me absurd, you are saying we don't really even need a Supreme Court! The Constitution says what it says, and things are either Constitutional or they're not, so why do we need a Court to decide anything? Any SCOTUS ruling is an interpretation of the Constitution, whether right or wrong, it is always based on someone's opinion of what the Constitution is saying. Generally, SCOTUS cases are between two sides, one feels their Constitutional rights have been violated, the other side feels no Constitutional violation has occurred. Both sides believe they are right, that they have interpreted the Constitution correctly. Before the Justices rule, neither side can claim their position to be "constitutional" because the case has not been decided. Constitutionality rests with the Justices interpretation of what the Constitution says. If they do not rule as you see fit, it doesn't mean they "got it wrong" it means you don't interpret the Constitution the same way they do.
One thing about application of the Constitution, it is sometimes very complicated. You take a very simplistic approach... heck, it's right there in black and white, this is constitutional, and that ain't, couldn't be any clearer! But often times, it is a matter of TWO Constitutional rights, and which one takes precedent. Yes, it's Constitutional to have the right to Free Speech, it's not Constitutional to endanger the lives of others by yelling Fire in a theater. Sometimes it's not so clear as to which right trumps the other, or which Constitutional guarantee is more important and significant, whether it adversely effects society or endangers the public... It's why they invented a thing called Constitutional Law.