An old thread, but that I didn't mind adding some analysis to, considering that it's unfortunately still very relevant today. So many problems with this.
To first address the motive of the original statement, the promotion of a conspiracy theory to instil division and fear: U.S. Muslims cannot establish Sharia, just like you cannot establish your pipedream state theocracy, it would be unconstitutional. It is also unconstitutional to make laws prohibiting a faith in the U.S. Many moderate Muslims, the majority, are happy not to live under a theocracy like Sharia. Muslim U.S. citizens are expected, like all U.S. citizens, to be under U.S. law. Theocratic "laws" do not matter. And it doesn't mean that most people don't have morals (including agnostics and atheists). Non-Christian is not degenerate.
The scattering of tongues is an iron age myth, for the generally illiterate people of the time, to explain that multiple nations and languages exist. Like origin myths, this also served to support nationalism and pseudohistory about the actual origins of language, to pretend that theirs, likely Hebrew, was the first. We know today that it was not, just like their God wasn't the first, and we understand how languages develop through purely human processes. Linguists and historians have been able to classify them and map their development up to some point. Interestingly, they don't only scatter, they can sometimes converge in lingua franca. Unless it was a physical god, believed to literaly sit somewhere close enough in the air (naive isn't it), there is no way that he would feel threatened by the height of a human tower (why would a powerful god fear anything anyway). This was an invalid human vanity argument (see "essentially be Gods"), considering that all cultures and myths on Earth are human, without a divine origin. It's possible that the story's tower was partly inspired by the existence of the ruins of an ancient Ziggurat but this is no indication that the myth is historical.
Allah is not a new name for a moon god, but another one for Yaweh (Islam is an Abrahamic religion, like Judaism and Christianity). While I think that no informed person should worship such an injust war god, especially one created at man's image (an author had it backwards but appreciated the relationship), it would correspond to Jesus' father. To nontrinitarian Islam, Jesus is an important prophet. To them, the prophet Mohammed is also a founder and last prophet, like Jesus in Christianity. Read on it from reliable sources, not your group's propaganda.
"I have often asked myself why did God scatter the people in Noahs day?" While this is a loaded question, the answer is simple: he did not, it's a story. Humans can divide for a number of reasons and can use non-legitimate divine justifications. I was raised in a fundamentalist Christian high control group that enjoys self-segregation and suffers from persecutory complexes because of its own delusions. I too, always had questions. The amount of apologetic literature attempting to address them is incredible, but also unsatisfactory (and some could consider all that extra material to be attempts to add to sacred scripture, something an author claimed merits divine wrath). Most of those questions become invalid, or have better and more explanatory answers, when an intellectually honest endeavor for knowledge is pursued. The latter is also the goal of science. To develop and improve processes of knowledge acquisition, hypothesis testing, reduction of observer bias, then constant revision. The goal of genuine education is to teach about the knowledge attained, some practical and beyond, trying to minimize ideological corruption. This includes the history of religions and their texts and basics of critical thinking.
Those who have had the opportunity to learn enough this way are less easily manipulated by your hatred, division and fear propaganda. Unfortunately, not everyone is allowed access. In the U.S., many children are still homeschooled (there's even an industry of indoctrinatory, corrupt schoolbooks) or sent to corrupt private institutions, producing more generations of ignorant manipulable people. This vulnerability is exploited by corporations, cults, quacks, accelerationists, populist fascists and even foreign powers trying to undermine democracy. In some cults, education is even frowned upon. Christians are no better than Muslims in that regard, both have fundamentalists and progressives.
A good direction would be for everyone to keep improving public, multicultural education and access to it, to make it good enough so that quality education no longer be a valid concern to defer to private schools. To reflect actual society and its gradual progress. I'm almost certain that the author of the original post is also anti-tax, for obvious reasons. But just look at the success of other developed capitalist democratic countries investing a little more in health and education...