Lenta.ru believes that not only Muslims, but also Orthodox Christians who fast, Jews who keep a kosher menu, Hindus who observe Ekadashi, and even completely non-religious vegetarians/vegans/raw foodists would happily subscribe to this set of rules. In short, everyone whose diet differs from the norm.
Inappropriate question #1: "So you don't eat for all 30 days during Ramadan?"
It is quite obvious that Ramadan would hardly be observed so widely if the rules forbade eating for a whole month: few people could endure such a hunger strike.
In fact, during the holy month of Ramadan, devout Muslims abstain from eating, drinking, smoking, and intimacy only during daylight hours. Ramadan lasts 29 or 30 days, depending on the lunar calendar. The fast begins at dawn and ends at sunset.
Inappropriate question #2: "Do you mind if I eat?"
The basic principle of any dietary restriction for religious reasons is self-discipline. Imposing one's values on table companions is not part of a believer's task.
Inappropriate question #3: "Why do you do this? Isn't it harmful?"
This question implies judgment. Maybe you shouldn't set yourself up negatively against something you know almost nothing about?
Most religious fasts are very important to believers, but no one forces them on anyone. In any religion, restrictions are observed only by adults and healthy people (ideally, those who understand why they need it). If it's about people following a certain diet for non-theistic reasons (e.g., vegans), it's logical to assume that before changing their diet, your interlocutor has studied enough literature and knows how to make it not only harmless but also beneficial to their health. If you're genuinely interested, they will tell you.
Inappropriate question #4: "Is it a good way to lose weight?"
In the case of Ramadan, one should not hope for weight loss, because you have to eat dinner late in the evening, trying to make up for missed breakfast and lunch.
There is plenty of scientific evidence that other religious fasts can improve immune system and brain function, normalize blood sugar levels, and of course help lose excess weight. But any thoughtful believer observes their restrictions for less mundane reasons.
As for vegetarians, many of them do avoid animal-based food for health reasons, but here too ethical considerations prevail. In short, don't confuse the above categories of people with proponents of a healthy lifestyle.
Inappropriate question #5: "You must be very hungry?"
With experience, you learn more and more interesting recipes made from ingredients that don't conflict with certain beliefs, so you don't go hungry.
Inappropriate question #6: "How about you eat this? Come on, I won't tell anyone!"
Well, there you go. Apparently you still haven't understood anything.