It is racist BS. The father's statement ....
“Is it because my son is from Alabama originally?” Darren says he asked Winger. “Is it because Schauble is someone of importance? In Grayson’s group of friends, every single one of them is of a different ethnicity—Korean, Vietnamese, black, white, Hispanic. Our home has always been open to a wide range of people.”
That includes Julian Eubanks, a childhood friend of Grayson’s mother who bunked with the Thomas family for the first six months of 2011 while he looked for acting work.
... is not helpful either, in my opinion. One does not need to display one's friends of other races in order to "prove" something to the real racists. It's an "appeal to moral authority" that is not moral, has no authority, and that is simply accepting the racists premise.
That said, I hope Darren gets a lawyer and sues their butts off.