PARK CITY, Utah — An anti-Israel march that included booted “Scream’’ actress Melissa Barrera interrupted the Sundance Film Festival on Sunday, holding up traffic as Hollywood elite attended movie premieres and parties nearby. Barrera, 33 — who appeared in “Scream VI” but was fired from the seventh “Scream” film over her controversial remarks on the war — joined the hourslong protest midway through as it choked the city’s historic main street and delayed festival-goers making their way to and from events. Barrera was let go from the horror flick in November after posting on Instagram, “Gaza is currently being treated...