Artists aren't hard lined, at least not here. They are passionately against the death penalty.
What is right-brained? You mean their right half of the brain is dominant? This may be true for most people. But passionate behavior and logical reasoning both come just as much from the left as from the right part of the brain.
The whole left brain and right brain myth is a gross simplification. Some things that are typical right brain activities, such as dreaming and mental pictures, seem to generate a bit more right brain activity. So you can't divide people based on that.
And even if you do, passionate people will be passionate about different things and for different reasons, while logical people reason on different things and come to different conclusions.
You could split people up that way, but it has nothing to do with dominant brain sides or left or righthandedness. Even while I would identify most right wing politicians as being in the 'left brained' group, I can think of some exceptions. And the other way around too.
When I watch the house of commons I always see Blair getting attacked by his own labour people.