Are most serial killers alpha-male?

I don't think that they are an alpha male because they are cowards. An alpha male is willing to fight another alpha male. A serial killer, on the other hand, tends to be a bully and a coward. Do they attack strong men? No, they prey upon someone weaker than themselves, which makes them nothing more than a plain old bully. There is nothing glamorous about them at all. They are too spineless to fight someone who is their own strength. Same for men who beat up women. Cowards, losers and bullies who are too afraid to fight someone their own size.