Complex sentence: Thus, he goes to the Island of Misfit Mascots Commune, for mascots whose messages are dumb or who simply can make no sense as well as the fact that they all seem to believe they "are" the animals they're portraying.
Split into simpler sentences: Thus, he goes to the Island of Misfit Mascots Commune, for mascots whose messages are dumb or simply make no sense. Many mascots here also seem to believe they "are" the animals they're portraying.