Folks feel a greater sense of self-confidence when they have the skills to confront difficulties. If your workplace is suffering, work with your employer to have the issue recognized and addressed. Just one or two days of training can make an enormous difference. Think of the lack of productivity that the stress of conflict creates. People have feelings.
Feelings are powerful.
Fear is one of the most powerful, and that's what's showing up when you work in a tension-filled environment. There is enough tension in the creativity and the deadlines that normal, productive work creates. The first and most important thing to do is to exam your own behavior. Often, when you have already decided that you don't like someone, or that they don't like you, that attitude is conveyed in your non-verbal communication. Work on yourself first.