In a statement to The New York Times, Alito did not dispute the image. He said he had no involvement in its flying, saying the flag was placed by his wife Martha-Ann Alito, who had been offended by a neighbor's yard signs.
"I had no involvement whatsoever in the flying of the flag," Justice Alito said in an emailed statement to the New York Times. "It was briefly placed by Mrs. Alito in response to a neighbor's use of objectionable and personally insulting language on yard signs."
The Times reported that the yard signs were anti-Donald Trump.
Well that certainly dispels any sense that he might be biased. It's just that his family feels personally insulted when someone criticizes Donald Trump.