Instigate animosity and dread is the most easy thing in the world

You just say to the people

"we are the greatest people in the world.we represent justice,democracy and freedom.those people are basebred.they represent evil,guile and autarchy.their purpose is to deprive our people's freedom and property.their purpose is to drive our people away from our homeland.their purpose is to threaten us and destroy us.so we must destroy them before they destroy us.that calls "first strike".

Dose that sound familiar???Yes,that is what US government is doing.