ebrown p wrote:
It's a broken cross-- symbolizing a hatred for Christianity. People opposed to war are supporting the Anti-Christ.
The designer of the logo, Gerald Holtom, choose something that would be easily recognisable, like the radioactivity hazard symbol, and circular, so it would be suitable for a badge. It was not his intention to use a Broken Cross per se, but simply used the Semaphore positions of 'N' and 'D' for the internal markings.