A Republican senator known for rhetoric recently described as “stupid” and “racist” was trolled on social media Wednesday after he repeatedly swore at a congressional witness during a Senate budget committee hearing. Sen. John Kennedy (R-LA) used multiple profanities as he peppered Professor Geoffrey Supran about his testimony on the oil industry’s propaganda and misinformation tactics. “Big oil is the new big tobacco,” Supran testified. “As a scholar of disinformation, I do not use the word lie’ lightly. But no other word adequately describes the oil industry’s brazen efforts to mislead the p…