I stated up-thread a bit that there is a reasonable line, and used the cake baker as an example:
Scenario A: arbitrary person walks into the bakery, sees a cake in the display cake, and asks to buy it as-is. Baker says, "we don't serve your kind here." IMO, that is potentially actionable discrimination, because it is not a reasonable violation of conscience on religious grounds.
Scenario B: person walks into the bakery, asks the baker to bake a custom wedding cake, for a homosexual wedding ceremony, complete with all applicable decorations. Baker says, "I'm sorry, but I would view that as me participating in your ceremony, which would be a violation of my religious beliefs." That would be a reasonable violation of conscience on religious grounds, and not discriminatory.
I have argued that race discrimination falls under Scenario A, as does discriminating against the lawfully armed.
So the "reasonable line" or the reasons for a "violation of conscience" are OK if they fit your personal definition ?