I feel like Hitler demonstrates how there are a multitude of intelegence a which don't necessarily (but often do) overlap. For example his book, 'My Struggle' had very little structure and was repetitive and poorly written (from what I have heard). This makes it very difficult to read. This indicates below average intellegence. However, his ability to manipulate those around him has been rivalled by few other historical figures implying huge social intellegence (which, from the little I have read is usually the limiting factor for ability to manipulate).
Ninja'd