I think it is false to say we have to choose between Solon and Moses. Modern Western civilization is (to greatly simplify things) mostly a mixture of Hebrew, Greek, and Roman ideas. All three cultures introduced something vital -- also something that the modern hedonists, subjectivists, and collectivists hate.
The Law of Moses introduced conscience. Concience is an inner-directed, thus individualist thing. When one goes against the dictates of conscience, one feels guilt. Most other cultures enforce morality through an other-directed sense of shame (one has broken a taboo, one has discraced one's family) rather than guilt. Both a guilt-based and a shame-based morality can be subjective, of course. I think a guilt-based morality is more sophisticated, and it is a foundation of individualism. It is not for nothing that the guilt-inducing Jewish mother is famous!
The Greeks brought us philosophy and the scientific method. They also introduced a crude idea of democarcy and a sense that no person should be above the law. One problem with the Greeks was that their concept of law was vague, and Athens was periodically subject to demagogues and tyrants.
The Romans introduced the rule of law and the first modern government.
I think some people are being too harsh on the author from infidels.org. He at least recognizes some of the pillars of our civilization. He at least respects Athens. The ideal of the left today is not ancient Athens -- no, the left's ideal is totalitarian, war-like Sparta. The left is all about opposition to guilt-inducing (thus conscience-forming) religion. The radical left hates Greek logic and reason. They hate the rule of law, although some admire the bureaucratic system of government the Romans invented (the far-far-left -- the anarcho-enviro-communists reject even this).
I think there is more to the attack on the Ten Commandments than mere secularism. The Law of Moses is an easy target because it is based in religion and the establishment clause can be abused to ban from public discourse all religiously-inspired ideas that the left opposes. If you look around at our education system and popular culture, you can see that the left is also waging war against Greek rationalsim and the Roman ideal of the rule of law rather than the rule by men.
I think some of the supporters of the Ten Commandments being posted in the Alabama courthouse go too far, also. I have heard some of them say that the First Amendment only means that the Federal government cannot establish a state church, but that any state can establish an official church. This places us in the same mess that the Founding Fathers were trying to avoid.
Most of the Colonies had an official church, and people who were not members of the official church were persecuted and had to flee to another state. People thought that William Penn was an atheist because he envisioned a colony that did not have a state-sponsored church. The Founders built on Penn's idea of no state-sponsored religion. Why would there be an Establishment Clause if the Founders wanted each state to have its own official religion?
We are being given false alternatives if the only choice is between an amoral, Spartan-like totalitarianism the far left wants and a New England-style theocracy that some religious conservatives want. I support the placing of the Ten Commandments in the courthouse because the left is against it, it is part of our civilization, and because the left wants to censor all conscience-inducing ideas. However, the theocrats' idea that no religion is valid unless it is state-sanctioned is frightening, and in a way, idolatrous and irreligious. It is ironic that some atheists and some (I said some) religious conservatives have this in common -- they have made the state their god.
Were I depart from atheists is that they see all religion as unnatural. I don't. In point of fact a religious belief system it is a naturally occurring phenomenon amongst all peoples since the dawn of time. Therefore I consider religion to be a positive part of our human psyche, God or no.
I also consider the Christian religion (outside of the theocratic reasons) to be the most perfectly formed religion for the achievement of freedom and a just society. It is no accident that the Greco-Roman world merged with Christianity.
I too have found the Left's assault on or Greek and Roman roots to be a big threat. More so than the issue of the removal of the 10 commandments from the Alabama Court House.