That's just not going to happen. Are Catholic priests & churches forced to marry divorcees? Are Jewish rabbis & synagogues forced to perform interfaith marriages? Are Mormon temples forced to marry non-Mormons? Are any religious institutions forced to perform any marriages with which they disagree?
Obviously, the nonsense that has gone on with Christian bakeries, photographers, and other businesses is terrible, and a bad sign of things to come. But the First Amendment will pretty clearly prevent even the most activist judge from crossing the line between Christian-run businesses (which are, unfortunately, covered by various "public accomodations" laws) and religious leaders/houses of worship.
The government won’t have to force the Churches. They will choose to do so on their own.
The intentions of the LGBT activists are to get payback from anyone or anything that stands in their way including institutions they believe have wronged them.
I saw a news story in my local paper making noise about the fact that some Baptist church with the name “Bible” attached to it (a very conservative church) was not allowing a gay parishioner to take communion.
This fellow had announced to the church he was gay and then announced it to the media which published a story.
Seriously, the LGBT activists see themselves as the new “Civil Rights Movement” and anyone or anything including religious institutions that don’t accept their sexuality or gay marriage are defined as KKK bigots.
For any institution to oppose them means that institution is the equivalent of “racist” and that means media and government power will be called upon along with street demonstrations and other intimidation tactics to force churches to change.
The legalization of gay marriage puts us on a pathway to tyranny with opponents of homosexuality and gay marriage getting full demonization and marginalization.
When Brendan Eich was forced to get out a business he was involved in because he had given money to support Prop 8 in California he was getting the treatment people in 1933 Germany got because they were Jews.
LGBT activists are very hurt people but revenge isn’t a solution to their pain.
These activists may not wear the jackboots and brown shirt that a gay man named Ernst Rohm did in early 1930’s Germany, but they are surely emulating his tactics....high tech 21st Century fascism?