Man, I have religious people in my family that say "you can't eat meat on Fridays" during lent. But then fish is 100% okay to them. Makes no sense to me.
That rule might not come from English language and what was translated to "meat" doesn't necessarily mean all animal flesh. Even English has words like "beef" and "pork" and "poultry", "red meat" etc.
If you want to gotcha lawyer culture or religion, you'll need the actual sources. I'd suggest avoiding that, since it will just make you behave like an asshole.
Why do you have contact with such ...things? How could you take a human being somehow serious if it says things like that, especially due to being brainwashed in a fucking sect?!
We don't seem to have a collective tolerance to nazis or pedos, why do we have it for religious nutjubs?
Sure, not every nutjob is a danger in itself. But it's still a cog in the machinery of a retrograde force.
A +1 that helps normalizing what should be shunned.
But yes, fuck religion. If people wanna believe stuff, great. The universe is a mystery. But the moment they gather and start having to believe what the cult-douche says, shit gets dangerous.