The finance department and the purchasing department fought. As an employee of the operation department, should I stand by and watch?

The finance department and the purchasing department fought. As an employee of the operation department, you should not stand by and watch. After all, you are all colleagues. You should persuade them to leave. It doesn't matter who makes sense and who doesn't. What is important now is to calm them down. If you don't do this, they will hate you in the future.