Are you more interested in how to handle tag edit wars in general, or just this specific one? If you want in general, what you did was best - do *not* reciprocate or rollback, and start a Meta discussion to get things settled with proper discussion.

If you want specific feedback, well, [dmckee has that for you](https://physics.meta.stackexchange.com/questions/836/whats-the-best-way-to-handle-tag-edit-warring/837#837). ♪