Jack Black announced on social media that he is against band partner Kyle Gass

Canceling Tenacious D's current tour in Blowback

Who at the band's concert in Australia on July 14

Made a controversial comment regarding the assassination attempt on Donald Trump.

Black presented Gus with a cake on stage to celebrate his 64th birthday

When Black asks Gass to make a wish

Gase replied: "Don't miss Trump next time."

Gass apologized for the comment on Instagram

saying it was a "severe lack of judgment".