When Canada was formed did the Canadians take a vote amongst all inhabitants of the land? Obviously the people of Catalan do not need consent from Spain to be free. Their "constitution" is nothing more than a flawed set of laws that must be ignored. I guess you think American black people should be considered as 3/5 of a person because the US constitution said so (Article 1, Section 2, Paragraph 3). Constitutions are not absolute or eternal.