Mike Johnson also worked as an attorney for ADF and another far-right Christian group on court cases trying to block same-sex marriage.
The Federalist Society controls the judges on the courts and the ADF controls the lawsuits that make it to the courts.
Mike Johnson is so extreme that he is even trying to take away divorce rights for straight couples. In fact, that was how he first got on to the Christian right's radar: https://www.ktbs.com/news/arklatex-politics/u-s-rep-mike-johnson-molds-republican-messaging-as-5th-highest-gop-member-of-congress/article_e3a1f6b2-6fdb-11ed-b2b5-ff7d70d9bef4.html