Projection. The fear of being found out.

Why are so many Republican anti-gay politicians gay?

Why are so many Republican tough-on-crime politicians corrupt?

Why are so many Republican think-of-the-children politicians pedophiles?

Projection: if they do it, everyone is doing it: so we have to do something about that.

Fear of being found out: if you are the loudest voice against your own crime, surely nobody will suspect you.

Every accusation a confession.