I'm unconvinced; Roman religion predates the philhellenism of the Classical era, their language remained Latin and their attitude to Greek culture was fundamentally conquering rather than assimilating. I've argued this at length elsewhere, but what the Romans were doing when they carved statues, wrote poems and thought about philosophy wasn't trying to become Greek, it was trying making 'Greek culture' Roman. Without this, Greeks could have found pride in their culture: it could be the hallmark of a defeated yet culturally superior people. When their foreign rulers made it part of their own culture, though, it lost its 'national' character. So a Greek practising his native culture was inevitably, implicitly buying in to the Roman status quo. Listening to Homer could never be an act of defiance in Greece as long as the emperor in Rome was doing it too.