If a house is burning, and bucket of water is thrown on the blaze and doesn't extinguish the fire, this doesn't mean that water won't put out fire. It means we need more water. And so with nonviolence.
The reason I wouldn't dare to write a Western is simply because that seems to be so much a part of American culture. Maybe if I want to write a Western enough I should try to overcome that fear, but I'll certainly feel like I'm trespassing. I feel that that is so much a part of American foundation myth, it's part of the myth of America, the American vision of what America is, which people have glorified and then challenged and then vilified.