Because Mitch McConnell and the regular corporate GoP have been planning this for decades, getting legal precedents in place, getting judges into the right spots across the US, all of it.

The religious right were used as tools by them and the GoP elite always assumed they had exclusive control of them. Then Trump comes along and upends their control, and now Trump is a barely present fool and the religious right(see: Stephen Miller) are in full control of all three branches of the US fed.