"Please respond to the strongest plausible interpretation of what someone says, not a weaker one that's easier to criticize. Assume good faith."
I doubt that egypturnash intended a "snarky nit". More likely this is someone who's passionate about the underlying topic (grimoires!), naturally got excited when seeing the OP, and then was disappointed when it didn't go as deep as someone with their level of knowledge would expect.
It's bad, of course, to express that by putting down the OP or their work; much better to respond by sharing some of what one knows, as I explained at https://news.ycombinator.com/item?id=45561740.
Magic can certainly interact with things commonly seen as religion - talking to gods, angels, demons, saints, ghosts, ancestors, and other non-physical entities - but it doesn't have to. You can cast a spell without ever mentioning a single deity. Chapman's Advanced Magick For Beginners discusses some of the techniques involved in this but skips others that make it much more likely for you to be able to say "this is what is going to happen now" and have the universe listen.
You can also have your magic deeply intertwined with your religion. Prayer is magic. A pantheon of gods or a list of angels, saints, or demons is a dictionary of specialists; ask this god for help with your problems involving going on a trip, ask this saint for help with finding a thing you lost, ask this demon for help with learning math. And part of how you make one of these entities more likely to lend a hand with your problem is by regularly saying hi to them and making some kind of offering, which is definitely getting into the territory of religion.
Halloween is connected to the religious festivals, All Hallow's Eve and Día de Muertos. Whilst commercialism may have overtaken the holiday today, it is still a deeply sacred event to some, and can cause offense when it isn't treated that way.
In the same way some Christians are offended by the commercialisation of Easter and Christmas.
"Real world religions" would be better served by concerning themselves with more productive pursuits than getting worked up over every little perceived offense. Then there would be no ire at all!
You appear to have taken offence, at people taking offence. Which points towards beliefs you may hold.
Yes, there is balance to be found. But if people point out you've made fun of their beliefs, then adapt. No need to act out. We all have beliefs, whether or not that is an organised belief. Ideaology is everywhere in everything.
People are still people. Communicate and the irritation can fade.
Besides "Please don't sneer, including at the rest of the community." (https://news.ycombinator.com/newsguidelines.html), this guideline is relevant:
"Please respond to the strongest plausible interpretation of what someone says, not a weaker one that's easier to criticize. Assume good faith."
I doubt that egypturnash intended a "snarky nit". More likely this is someone who's passionate about the underlying topic (grimoires!), naturally got excited when seeing the OP, and then was disappointed when it didn't go as deep as someone with their level of knowledge would expect.
It's bad, of course, to express that by putting down the OP or their work; much better to respond by sharing some of what one knows, as I explained at https://news.ycombinator.com/item?id=45561740.