Rock band Third Eye Blind used a concert at the Republican National Convention in Cleveland on Tuesday to play obscure songs and attack GOP positions on climate change and gay marriage, angering convention-goers.

A video shared on Twitter shows the band getting booed, followed by singer Stephen Jenkins replying, “You can boo all you want but I’m the motherf---ing artist up here.”

Third Eye Blind tonite at #RNCinCLE event: We believe in tolerance, acceptance (Followed by boos) pic.twitter.com/WPRIEMZmEp — Tina (@tinpant) July 20, 2016

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In another video, Jenkins can be heard telling the crowd about gay members of his family and advising them not to impose fear on other people.

The band also reportedly asked the crowd, “Who here believes in science?”

Third Eye Blind was playing a charity concert that was put on by the Recording Industry Association of America to benefit the nonprofit group Musicians On Call, which puts on bedside hospital performances for patients, according to Yahoo News.

One woman told the band on Twitter that she has “never been more disappointed.”

From their official Twitter account, Third Eye Blind responded, “good.”

Third Eye Blind playing RIAA event in CLE & trashing @RNC platform to loud boos from Republicans. Then they play Jumper & everyone cheers. — Peter Hamby (@PeterHamby) July 20, 2016