Save this storySave this storySave this storySave this storyIn the streets of Los Angeles, in June, as the city clashed with ICE, the most visible symbol of the protest was the Mexican flag, the tricolor raised over the haze of tear gas and black smoke. Online, the symbol of resistance against immigration raids was something softer. On Instagram and TikTok, the children of Mexican immigrants shared photos of their parents with the same trending audio: “Hasta la raíz,” a song released by the Mexican artist Natalia Lafourcade in 2015, not long before Donald Trump descended his golden escalator.