This falls along the lines of nobody can make you angry without your permission or participation.
Every 100 years or so we are taught to say a different nationality is our enemy even though we may have never met someone from the country that they are from.
Anger, ego, greed, and hate can be controlled and these enemies are defeated. These emotions can come from outside sources if we let them in, but what if people try their hardest to invoke those emotions within us and fail? Are they really the enemy then?