Sure, if the accommodation is what's precluding you from performing, you're not going to be fired for not doing it, but in that case, you'll probably be fired f

Sure, if the accommodation is what's precluding you from performing, you're not going to be fired for not doing it, but in that case, you'll probably be fired for other reasons, or driven out in other ways. There's a lot of reasons to fire people if someone wants to, lots of things down to effectively what lens you view them through. (This is not claiming that this is good or bad, just an observation of how I've observed employment in the US to go.)