Democrats have an "unbelievable" double standard when it comes to their demands for the release of the unredacted version of special counsel Robert Mueller's report, Harvard Law professor emeritus Alan Dershowitz said Monday, while responding to Rep. Jerrold Nadler's, D-N.Y., comments he wanted to see if the document contained proof of "bad deeds and motives."

"Would he have said the same thing if [former FBI Director James] Comey started talking about Hillary Clinton?" Dershowitz told Fox News' "America's Newsroom." "Yeah, there wasn't enough evidence to go after her, but maybe she really did some terrible things?"

When Comey said Clinton had engaged in "extreme carelessness," Nadler and other Democrats went after him, saying it was not Comey's role to say such things, Dershowitz said.

"The role of the prosecutor is to say indict or don't indict," he said. "You don't express opinions about bad things people did where there wasn't proof beyond a reasonable doubt. The double standard is unbelievable."

The Mueller report will be released Thursday, and Dershowitz said he does not believe there will be that many redactions on it.

He added he believes there will be two separate reports involved, with half of those on the Mueller team thinking President Donald Trump was guilty and the other half saying there was insufficient evidence or he was not guilty.

He added, while he wants to read both reports, he does not think there will be new facts, as the obstruction case is based on what Trump said publicly and in tweets.