You certainly make a good point about the theme of people foolishly struggling to be "free", and I agree that the combination of Antique and Christian influences is sometimes odd - he does at one point explain how he reconciles the Muse with Christian theology, but it's not too convincing. And while I don't know enough about Protestant theology in general or British 17th century theological rivalries in particular to place Milton the way you did, it certainly makes sense to me. Okay, you evidently found the preaching less boring and insipid than I did, but that's just a matter of taste, more than of opinion (or it would have to be differences in our opinions on religion, rather than on Paradise Lost).

Where did you figure our disagreements would be?