You're judging what constitutes a deeply held belief system? The flying spaghetti monster is one of the fastest growing belief systems. Just check out its homepage.
You will also note that our beliefs include the 'theory' that global warming exists and is caused by a decrease in the number of pirates (see chart below). This will need to be taught in the classrooms as well. Like ID, take it on faith.
It is noteworthy that "intelligent design" has never produced a single graph. Never produced a cause and effect account. Never described a new species. Never contributed an iota to the classification of animals or plants in the taxonomic descriptions. Never introduced a new idea into technology.
In fact, ID has never contributed anything positive. It's all negative--"Evilution" has "flaws"--therefore ID must be right. Such a silly argument. It's really an afront to our god-given ability to look at the evidence and feel comfortable as to where this leads us.
Creationists have given me an enhanced respect for the FSM.