No, that's not how it works at all. It is clear you don't understand the issues or the history of the First Amendment.
Moreover, from a historical perspective, the more liberal the Supreme Court, the more likely it is to uphold separation of church and state.
If the Supreme Court, Congress, or President somehow discarded the First Amendment,
AND the government absorbed all churches into a government-run institution,
AND pastors were forced to remain with the official government-run institutions as government employees,
THEN something like what you say could happen.
But otherwise, that is simply fear-mongering nonsense.
I predicted it back in the early 1990s, as well as did a number of Christian advocacy groups.
The
Baehr v. Miike decision in the early 1990s had Hawaii's Supreme Court rule that the state must show a compelling interest in prohibiting same-sex marriage. The "Defense of Marriage" Act was passed by Congress in 1996 to prohibit same-sex marriage. One of the unintended consequences of that Act was to put the federal government in the role of defining marriage, which led directly to the situation today.
So yes, lots of people saw this coming. If you didn't, you weren't paying attention.