Let me explain something interesting about cultural standards.
See, cultures despite what one might think, are not created equal. A culture where it is acceptable to kill 12 year olds if they don't meet some standard is demonstrably worse than one that isn't. So when the maxim cultural difference is tossed around, it is often to excuse inexcuseable behavior.
Then there's the things that are simply cultural differences. One culture has no problem with women walking around topless. Another considers women showing their navels to be shameless flirts. Which is worse? Well, if we ignore some finer points, neither. There is no cultural disadvantage to women being topless, assuming it's seen as 'normal' versus them covering their belly buttons, assuming that is 'normal.'
On the functional specifics, we all agree that meat eating is okay (we'll ignore the vegan/vegitarian point of view for a moment, but don't worry, I didn't forget you. It's just that that's a different conversation). The question is what animals can you consume. Arab countries tend to have an incredibly visceral reaction to the consumption of pork. Even Arab atheists (yes, I have met them) find eating pork literally disgusting. They have this disgusted look on their face, as they gradual reconcile it rationally - but they don't stop being disgusted.
I'm drawing a parallel here, in case you missed it. What meats are and aren't acceptable to eat are largely cultural issues (except for monkey/cannibalism. Those are close enough that risks of disease transmission go through the ever loving roof. Too, too dangerous to ever be acceptable).