In my experience, the US constitution is treated almost as a holy book by a lot of Americans. As far as I know, no other state has had such a reverance and faith-like believe in it's constitution or any other form of secular law.
How did this reverance come to be? Are/were there any other nations with such a intense belief in their laws?
The US Constitution isn't really a list of laws for the people, it's a list of laws for the government. The most famous part, the Bill of Rights, is the highest law of the land and identifies the people's human rights (freedom of speech, religion, assembly, etc), preventing the government from creating laws restricting those rights. The rest of the Constitution focuses of government structure and maintaining separation of powers between the three branches to prevent anyone from becoming too powerful. It remains so important today because it still protects our human rights from persecution and keeps our politicians from gaining enough power to surpass these restrictions.
Can you give an example of what you're referring to? Many Americans certainly speak of the Constitution as a document that must be obeyed, but this should be expected of a document that's the highest law of a given region, preempting all other laws.
What specific statements are you interpreting as treating it "almost as a holy book" and with "[reverence] and faith-like [belief]"?