I could give you a lot of reasons for that.
But it's not just against white Americans, it's against whites in general.
Look at Europe…
The whites are becoming too dangerous for (((them))).
They don't listen to the Catholic Church anymore, they don't follow Islam, they are starting to realize more and more what is really happening in the world.
When most whites realize who has the power and why, (((their))) game is over immediately.