What the hell are you talking about? Name one time when some game plan was ran on another ethnicity in preparation of running it on Black Americans? All throughout history, Black Americans suffered from the actions first, then those same actions were ran on others later. So I don't know where you got this Black history you have read from, but all of the Black history (Black American Black history) demonstrates how we were always the first target, the group they practiced on, the group they harmed first.
What other ethnic groups are experiencing now, is what Black Americans have experienced for hundreds of years. Heck, even the Germans learned how to mistreat the Jews by seeing how Americans mistreated Black Americans.
"Racism—racial antisemitism—was the core of Nazi ideology and the driving force behind the Holocaust. Although Nazi Germany and the Jim Crow South were different, Nazi leaders learned from racist thought and practices in the Jim Crow South."
So that backwards claim of them doing to others before they do to us, and that is why we must defend others over ourselves is absolutely not something you learned from Black History. Well, not Black American history that is.