It was asked: 'did anyone ever die for theism?' If theism is defined as a belief in God or Gods then, surely, we should be considering the early Christians, Jesus and many others. Religious belief might be a stranger to many people in the modern world, but that doesn't mean that it has died completely. Given the right conditions, such as a universal crisis, it can be revived.
Belief lies deeper than the superficial world that we live in. And, although we are a part of that world, people are not that world - we have a depth that can be invigorated. Part of the difficulty of the modern world is the issue of confidence and belief in leaders. Those who should be leading and stimulating have been brought into question by the morals of what I hope is a minority in that group.

Unfortunately, there will not be a revival until something of value can be found among that leadership.