What is morally wrong about the U.S. Constitution? Start a thread on that and I'll check it out.
You mean aside from the fact that it disregards the biblically appropriate model of monarchy in favor of an elected executive leader...
... and establishes a legislature, the very nature and purpose of which is to "change the law," something the Lord repeatedly rebukes Israel for doing and which is thus also completely inappropriate and unbiblical...
... and which, itself (the constitution) is even designed to be rewritten repeatedly, which begs the question - if it was moral (or right) when it was written, and it's been changed about two dozen times, how much less moral/right is it today? Or was it immoral/wrong then, and has become more and more moral/right up to this point? Or maybe the whole, ever-changing evolution of it is a wash, in the end? It infuriates the Lord when we make laws that are contradictory to His established example, and when we have the kinds of laws He wants, it infuriates Him all the more when we then go and change them repeatedly...
... and which generally establishes various democratically-based institutions in our government, which are fundamentally humanist in nature and assume the inherent goodness of the masses, in contradiction to the biblical understanding that, at any given time, the majority are in rebellion against God...
Despite the strong Christian principles of many of our founding fathers, they were terribly lacking in their understanding of Christian biblical theonomy, primarily because of their near-obsession with ancient, pagan Greek philosophy which they often placed over biblical teaching. The system was doomed from the beginning, and the only reason it did so well for so long was because America was a morally conservative, predominantly Christian-based culture. But inevitably, our system taught people that they, the citizens, can force the government to change to suit their own selfish desires to dominate and take from their neighbors. Alexis de Tocqueville rightly warned us that our system would come crashing down when our citizens figured out that they could change the government so that they could take their neighbors in order to give to themselves:
"The American Republic will endure until the day Congress discovers that it can bribe the public with the public's money."
"A democratic government is the only one in which those who vote for a tax can escape the obligation to pay it."
Doomed from the start, because overall, our system is designed to be rewritten by democratically-elected representatives of the mostly-wicked masses, so that our system of governmetn is inevitably degraded more and more, over time, and overall our system of government and our laws are a tutor... a tutor that teaches its citizens false and immoral principles, leading people to a sense of entitlement and a generally depreciated value of human life. Well-intentioned, but doomed from the start, and today we are reaping the whirlwind.
REPUBLIC, n. A nation in which, the thing governing and the thing governed being the same, there is only a permitted authority to enforce an optional obedience. In a republic, the foundation of public order is the ever lessening habit of submission inherited from ancestors who, being truly governed [by monarchy], submitted because they had to. There are as many kinds of republics as there are graduations between the despotism whence they came and the anarchy whither they lead.
["The Devil's Dictionary" by Ambrose Bierce]