The level of ignorance regarding history is astounding! The sadder commentary is that this is the level of ignorance that exists BEFORE Texas rewrites history (even for much of the rest of the nation).
There was a time when most people in this fledgling nation hated indians and the answer at the time was to slaughter them. It's abhorrent, but a part of history, none-the-less.
There was a time Americans hated the Japanese, and even "Japs" as they were commonly called that were born in America were interred in prison camps. This too was abhorrent, but it really did happen that way.
There is, right now, at the bare minimum, a distrust of Muslims (and Muslim Americans). My hope is that it won't take generations (like with Japan) to figure out how to live/let live and work together.