Seventeen people were arrested after violence erupted during a protest outside a Donald Trump rally in Southern California on Thursday night. Hundreds of demonstrators blocked traffic, some of them waving American and Mexican flags. Some protesters hurled rocks, and smashed the windshield of a police vehicle. Scuffles between Trump supporters and protesters calling them racists left a man wearing a pro-Trump shirt with his face bloodied. Many demonstrators said they had come to peacefully protest Trump’s harsh rhetoric against Mexican immigrants.