If you are conservative, this may be a barrier to getting any work in Hollywood. That was the opinion of one top TV executive interviewed by Ben Shapiro for his new book, Primetime Propaganda.

The journalist has spent the last few years conducting 39 interviews with some of Hollywood’s top, writers, producers and executives for the book, which has been seen by Hollywood Reporter.

Some interview clips have been released to YouTube and show the extent to which popular shows like Friends and Charlie’s Angels were dominated by liberals.

In one interview, Friends creator Marta Kauffman described conservatives as “idiots” with “medieval minds”.

She admitted to choosing a particular actor as the minister of a lesbian wedding because she knew it would irk the conservative right.

“I have to say, when we cast Candace Gingrich as the minister of that wedding, there was a bit of a ‘f*** you’ in it to the right wing,” she said.

She also said she “put together a staff of mostly liberal people” to make the show.

Leonard Goldberg, producer of Charlie’s Angels and Starsky and Hutch, said the liberal agenda was “absolutely” a barrier to getting a foot in the door in Hollywood.

Liberalism is “100 per cent dominant and anyone who denies it is kidding, or not telling the truth,” he said. “There’s no question what the agenda is.”

He added: “You have to start with the premise, unquestionably Hollywood is a liberal community.”

Susan Harris, creator of hit 80s show The Golden Girls, told Shapiro that conservatives are “idiots”.

“At least, you know, we put Obama in office, and so people I think are getting – have gotten – a little bit smarter, but there are a lot of people who really have medieval minds in all sorts of ways,” she said.

Shapiro said television had become “perhaps the most impressive weapon in the left’s political arsenal”.

“My whole book is a plea for openness in the industry. Hire people from the other side of the aisle once in a while, or at least stop mocking them,” he said.