I'm especially surprised that anyone would suggest that the genocide

Look, you need to do a minimal amount of research on points you raise especially when they're controversial. And if you are surprised that they raise any controversy, then you are like the person who thought that Reagan could not possibly have won because nobody they knew voted for him. Consider this your introduction to the wider world. Here's wikipedia on the topic (I quote from it for convenience as usual, not as an authority).

In his book American Holocaust, David Stannard argues that the destruction of the aboriginal peoples of the Americas, in a "string of genocide campaigns" by Europeans and their descendants, was the most massive act of genocide in the history of the world.[13][20] While no mainstream historian denies that death and suffering were unjustly inflicted by a number of Europeans upon a great many American natives, most scholars of the subject maintain that genocide, which is a crime of intent, was not the intent of European colonization. Historian Stafford Poole wrote: "There are other terms to describe what happened in the Western Hemisphere, but genocide is not one of them. It is a good propaganda term in an age where slogans and shouting have replaced reflection and learning, but to use it in this context is to cheapen both the word itself and the appalling experiences of the Jews and Armenians, to mention but two of the major victims of this century."[21]

I come here half-expecting reflection and learning, and am disappointed when I find propaganda terms and slogans.

I'm amazed that people want their stories to be so one-sided.

Physician, heal thyself. You just got done calling Thanksgiving "National Native American Genocide Day." Where is the balance in that?

Furthermore, why pollute that particular celebration with the taint of some injustices committed by Americans? Shall we call Christmas "Forced Conversion of Jews Day", polluting it with some sins of Christians? Shall we call July 4th "Bombing of Hiroshima and Nagasaki Day", polluting it with the taint of some terrible acts committed by the US?