Because he was simply wearing a pro-Trump “Make America Great Again” hat.
According to Fox News:
A 74-year-old man said a woman berated and called him a racist at a California Starbucks on Monday after she spotted him wearing a “Make American Great Again” hat in support of President Trump.
The man, who was identified as Victor, told KTVU he was wearing the iconic red hat when the woman began yelling at him outside the coffee shop in Palo Alto.
“This woman came over and not only started screaming at me, she turned to the Starbucks audience and said, ‘Hey, everybody come here! This guy’s a racist! This guy hates brown people!’” Victor told the news station.
Victor, who is Jewish, also told other news outlets that the woman called him a Nazi.