The story of Xerxes's statue

As Cheshire points out on p. 89 (question 5), the story of Xerxes's statue (Cheshire, 87) seems to be deliberately placed out of chronological order to be read together with the stories of Demaratus and Thais (Cheshire, 87-88). Given what you've learned so far about Plutarch and Alexander, what do you think Plutarch is trying to say about Alexander overall in these three stories grouped together: (1) Alexander witnessing Xerxes's statue; (2) Demaratus' view of Alexander's achievements; and (3) Thais's leading the charge to burn down Persepolis?

Some factors to consider: Alexander's relationships with Greeks, Alexander's relationship with the Persians; Alexander' attitude toward excess.