In most of the USA, it is not a big deal for anyone to freely change their professed religious affiliation.
I would argue that to remain in false communion with any “church”, is itself an evil act.
I don't agree with those who seem fixated on “changing the rules” for those others whose spiritual beliefs they disagree with.
In the USA, if no group/church exists, one is free to start their own. Or to become a church of one.
Many would deride me for advocating “picking and choosing” what spiritual laws to “believe” to be truth.
In part, I do.
But do it honestly, after prayers and with spiritual humility.
The corruption of many major religions came about because many of those who profess belief, do not believe.
In the USA, a peacefull, loving purge of unbelievers from any established “church” is possible. And probably needed.
Elsewhere? It could be dangerous.
How important do you consider your beliefs?
This is why gay marriage and free exercise of Christian conscience cannot peacefully coexist. Christians might admonish gays and might even invite them to Christ or to therapy to help them change their ways. But they will never sue them or seek to use the law to compel them to accept the Christian way. The gay mafia, on the other hand, has no compunction about using the club of the law to force Christians to violate their beliefs.