Complex sentence: She is liberal and is a champion of women's causes, thus having strong opinions on many issues, including an extreme dislike of guns and violence, although in one plot line she had a romantic relationship with a conservative ballistics expert.
Split into simpler sentences: She is liberal and is a champion of women's causes. She has strong opinions on many issues, including on guns and violence, although in one plot line she had a romantic relationship with a conservative ballistics expert.