Earlier quoted context omitted.
It's not that religious establishments are above the law, it's that congress (the source of laws) does not have the authority to make any laws that apply to religious establishments. It's a subtle difference. Churchgoers don't get a free pass to break the law. The establishment simply is immune to regulation of any kind attempted to be placed upon the organization itself by congress.
> congress (the source of laws) does not have the authority to make any laws that apply to religious establishments It's not obvious that this is what was meant by 1st amendment. Other interpretation is that congress simply can't make laws that apply exclusively to religious establishments. EDIT: I must add that the interpretation you mentioned is undoubtedly the "canonical" one in public's mind, so the situation is…
This interpretation would be compatible with taxing churches (as long as they are all taxed equally).
It was certainly my view before I studied the topic.
It turns out that congress is not allowed to legislate religious establishments at all.