These are almost certainly the same people who believe the earth is only 10,000 years old.

As to the possible error in punctuation....the documents impact and context are clearly achieved regardless of the presence of a period. The Declaration of Independence is not a legal document; it is an essay stating the rights of man as understood by our forefathers. It is a list of grievances and defines how its going to address these grievances by establishing a Government by the authority of the governed.