I assumed from the phrase "massive jackass" in your post that cruel behavior from him was typical and dramatic enough to be a marked pattern. Most companies /are/ willing to fire people who repeatedly disrespect and are cruel to their coworkers. It's part of a bare baseline that you need to maintain to have a decent work environment for your employees. You and the woman he discriminated against makes at least two separate eye witness reports to an egregious offense (protected class discrimination), and I assumed from your description of him that his cruelty wasn't just exposed to you two.