Pope Francis -- Parade Crashing Little Girl Mobbed at LAX

The little girl who squeezed through a police barricade to hand the Pope a message about U.S. immigration ... is getting the Kardashian treatment, now that she's back in L.A.

Sophie Cruz and her dad were swarmed by photogs at LAX, arriving from Washington D.C. where earlier this week the 5-year-old became the poster child for America's immigration issues. She's a U.S. citizen, but her parents are illegal immigrants.

When she got an impromptu audience with the Pontiff, she handed him a drawing of herself with friends of different races and the note ... "My friends and I love each other no matter our skin color."

Sophie's become quite the spokeswoman for her cause. Check out how she addressed the crowd of scrambling photogs. We got in one question about Donald Trump to her dad. He's pretty smooth too with the media.