About the identity fraud, I did speculate that it might be the reason why they had that second fight since Robert confirmed that the rage they had was 100% due to the gruge between the two lineages, but when we meet him in the corridor following Nikos he said "This is all your fault! You pushed him over the edge!" that is why i think that his hatred for the Argoi is because of the acts of Nicos's grandfather during Clement's time as the Master but their is also this subconsious part that stems from them sharing the title of the Argos Panoptes one being the descendant and one wearing the mask.
And i too know that Pedro was not a "good person" and I never hated him for it, but we are all under this impression becasue of us knowing of his background as P. But the Master has no way of knowing it unless their is a cannonical reason to the Mc seeing the Hinterland scenes.