That's putting the cart before the house. Due process isn't an agent that enforces your rights, due process is a convention of how things are done. Nothing fundamentally prevents anyone from simply not following due process, other than the actual power structure of society, i.e., what people could get away with. That actual power structure depends on stuff like knowing things about people allowing you to control them. To illustrate what I mean: If your opponent can blackmail all judges, there is no due process for you.