Good has never been afraid to use force. It calls on its adherents to kill evil and send it to Hell, the Abyss, or wherever. Good wants mercy, but knows when to overpower. Is sending someone to Hell better than a forced conversion? I'd say no, using the helm is not an evil act. Chaotics wold oppose its use, and it may not be a good act in and of itself (A good character would take it upon themselves to guide and aid the re-aligned being).
