It makes sense. Frollo is a man who considers himself morally (in Henri's case, intellectually) superior to everyone around him and bases his identity on that, but is eventually destroyed by his obsessive lust for a woman he can never have. That part in Hellfire where he's watching Esmerelda's visage in the fireplace might as well be Henri autistically screeching at Pippa on his computer screen. The difference, of course, is that Frollo is a interesting and human villain, and it's captivating to watch his façade of moral superiority crumble as his inner desires take over and expose him for the monster he always was, whereas Henri is just a retard. Just like with Shinji, Nietzsche, etc., he's using surface-level media and literature to make surface-level connections that, to him, seem incredibly profound, and help him cope with his miserable existence by being able to pretend he's some tragic, tortured soul, when anyone on the outside can see how pathetic and delusional he truly is.