Liberals create their own "reality" from movies.
I can't think of any real life cases where an American has shot illegal immigrants like in this movie. I CAN think of many, many cases where illegal immigrants have murdered, raped and/or stolen from Americans.
However... Every Liberal who goes to see this film will be imprinted with the narrative of "psycho racist Americans are killing innocent "Dreamers". That will become their version of reality.
Propaganda is a very powerful tool.