Mallory Harvey, an organizer with the Norman Tea Party, dismissed Collins' comments as “totally absurd.”
“I just don't put much credibility in wild statements like that,” she said.
Matt Pinnell, chairman of the Oklahoma Republican Party, said Collins' comments crossed the line of decency.
“Chairman Collins has stooped to a new low with his latest remarks,” Pinnell said in a statement. “This is as offensive and despicable as they come.
“To imply that a deranged madman who killed 168 people including 19 children is someone like me, a ‘right-winger,' is way over the line. He should immediately apologize for making that statement.”
Collins said he has no plans to apologize and accused Pinnell of trying to politicize his comments.
“I think there's a lot of things going on within his own party that he ought to be dealing with instead of trying to pick a fight with me,” Collins said.