This is not a fair take. To know enough about something like a different religion is not something you just go fix. It's not like reading the Wikipedia page on Taoism will give me the cultural context to evaluate how a joke about Taoism will make people feel. Give how often otherwise smart people make insensitive remarks about classes of people they should be familiar with (at least in the US, like women, native Americans, Mexicans, etc) I suspect "fixing it" is harder that you realize and an easier way is to simply ask (which I did).

Making people feel bad is what makes something culturally insensitive. Gaining the perspective necessary to tell when that might be the case isn't so simple that you should sum it up as 'you could fix that'. As you well know it can be nuanced.

Worse, it just occurred to me that you're chastising some one for asking questions in order to 'fix that'. This isn't a 'just asking questions' guy topic so there is really no reason to doubt motives.