The bottom line is that the issue of Chief Justice Moore's display of the Ten Commandments represents a fault line between real Americans, who adhere to the Biblical principles on which our nation's institutions were predominantly founded, and secular humanists, who reject the need for laws and customs to be founded upon immutable principles, even if they are nominally Christians or Jews. It is the secular humanists whose beliefs are ahistorical and subversive to the principles of the Founding Fathers.
However, the secular humanists control the mainstream media, the Democratic Party, much of the Republican Party, and the judiciary, including a majority of the Supreme Court. The Feds have the guns; it appears that the Alabama Attorney General will cooperate with them. Barring a truly massive outpouring of public support (it is hard to picture Federal marshalls clubbing and teargassing their way through thousands of nonviolent demonstrators), the monument will come down. I do not foresee massive civil disobedience taking place.
Thus passes the glory of America.
I think it is because the action is saying, in effect, "the Ten Commandments are antithetical to the law."