The drummer also weighs in on Drew Brees and Colin Kaepernick.
The Halestorm frontwoman praised Thunberg, comparing her to other prominent young woman who have effected change.
It’s not the first time the Slayer frontman has stirred up a frenzy of comments by sharing political content.
“Hey @Nike, if you’re gonna make the shoes, make the PIG SOCKS to match. Right?”
Predictably, things got pretty ugly on her Twitter feed.
He also appears to come out in support of Catalan’s recent vote for independence from Spain.