I think all of the recent media slandering against Mike Johnson is much more telling of what kind of people the media ae, rather than that of Mike Johnson. I would expect the media to slander Mike Johnson as "extreme" or "MAGA republican", but to slander him because he's a Christian is a bit odd, because the majority of the U.S. population are Christians.
So the media is positioning the Left and Democrats as anti-Christian, which isn't going to win over more voters.