Cofty,
To me, there is merit in educating people to use their mental abilities have a better understanding of the world and the universe around them and therefore live a better life. If that leads people to question the usefulness of a divine entity, it's purpose, and ultimately, the very need for the existence of such entity, so be it. The outcome may lead to atheism, to agnosticism, to apatheism, or to an invigorated sense of theism or spirituallity. However, to set oneself for the goal to destroy the sense of spirituallity, the sense of connection to someone and something greater than ourselves, that is to kill something within us that makes us being uniquely humans. To "kill" God is to kill also part of our humanity.
Eden