Before one rushes to the aid of those who are powerful, one might first observe those who live underfoot. It is reasonable to say that in the lifetime of your children, it will still be a Constitutional right for Christian businesses and employees to deny gay employees or customers.
By definition those who are powerful don't need my aid, and I'm only here to learn.
Denying an employee (and even a customer, if one really wants so) for any real reason is already possible and done, by invoking any other reason. Such a Constitutional Right doesn't change anything.
Trying to coerce people into interacting with persons they don't like is either moot or, if apparently efficient for a while because "those who are powerful" enforce it, leads to a major clash as soon as this power vanishes.