Agreed, Raiders fans are the absolute worse, not because they yell at the players on the field, but rather that they want to fight (literally fight) any fan from an opposing team. It is the way they are.
Other fans can come to Arrowhead and wear their Jerseys. I have even high-fived them in the stands when their team does something good. The sportsmanship and acceptance of other fans in Arrowhead has pretty much been above reproach.
Not so with Raiders fans. If you walk into a Raiders game wearing red, you take your life in your own hands. It is so bad that at LA collisem when the Raiders played there, they stopped serving alcohol because of it.
Raiders fans are some of the worse.