"Intelligence agencies"
Let's start with your first example.  What intelligence agency was responsible for native American massacres?  As far as I was aware, we didn't have any intelligence agencies until they were created in the 20th century roughly a hundred years after the Trail of Tears.

"You are hopelessly brainwashed."
Yes.  I'm hopelessly brainwashed with critical thinking based upon history and facts.  It's truly a horrible condition to be in.