Billie Eilish‘s anti-ICE Grammys speech has set off a firestorm of controversy over the past few days as social media users weigh in on her comments. The latest salvo comes from Mark Ruffalo, who told “Marty Supreme” star and “Shark Tank” host Kevin O’Leary on Threads: “Why don’t you STFU.”

“It’s hilarious,” Ruffalo’s post continued. “You will go on any show and talk shit about any number of things and smugly expect us to listen to you, but you will dig into a real artist that dwarfs anything you dream of doing for actually saying something that resonates with 100’s of millions of people the world over. It’s astounding the fantasy double standard Kevin O’Leary lives in. You played yourself well in ‘Marty Supreme.’”

In “Marty Supreme,” O’Leary plays a ruthless businessman who finances Marty Mauser’s ping pong career while humiliating him in grotesque ways.

Ruffalo was responding to O’Leary’s recent criticism of Eilish’s Grammys speech on Fox News. “It’s the first lesson 101 for celebrity: as you rise up, whether you’re a film star or music star or whatever, shut your mouth, and just entertain,” O’Leary said.

At Sunday’s Grammy awards, Eilish accepted her Grammy for song of the year with a speech that has riled up conservatives. “As grateful as I feel, I honestly don’t feel like I need to say anything but that no one is illegal on stolen land,” she said. “It’s just really hard to know what to say and what to do right now, and I feel really hopeful in this room, and I feel like we just need to keep fighting and speaking up and protesting, and our voices really do matter, and the people matter, and fuck ICE.”

On Wednesday, her brother Finneas came to her defense, saying on Threads, “Seeing a lot of very powerful old white men outraged about what my 24-year-old sister said during her acceptance speech.”