Belgium sought to make the slaughter of food meat humane, so they wanted quick slaughter of a stunned animal. Jews argue that their way kills faster, so it is more humane. I suppose that there are medical scans (such as MRIs or CAT scans) that could analyze brain chemicals to try to understand if the animal was in pain.
Antisemitic theists often use Jewish rites of slaughter to assert that Jews are bloodthirsty or locked in ancient pagan traditions of animal slaughter. They assert that it is akin to Satanic animal sacrifices. There still appears to be cultural rifts in understand one another.
Jewish dietary laws are partly about avoiding illness (from a time before refrigeration) and partly about compassion for the animals.
Thus, the orthodox Jewish tradition of not drinking the milk and eating the flesh of the same animal at the same meal is about not wanting to be too cruel to the animal.
Pigs eat almost anything, and inherently are filthy and diseased. In the United States, today, much pig meat is salted. Pacific islanders can't stand the way the US processes the meat, since the taste is radically altered. Yet, it is that salt that kills (some) parasites and (some) bacteria. Cooking, of course, helps tremendously.
The Christian and Muslim religions come from the Jewish religion, but many of the Jewish dietary laws are omitted in the Christian religion. Thus, Christians can eat pigs, whereas orthodox Jews cannot. It is common, in modern times for non-orthodox Jews to eat and enjoy pig meat. Usually, when an orthodox Jew first tastes bacon (if they ever dare to), it is like eating worms....disgusted at the thought of it.
Making Kosher Meat
Both Jewish kosher meat and Muslim halal meat is drained of blood. Jewish kosher meat is soaked in clean water for a half hour. Both kosher and halal meat is blessed by a religious person who inspects the kitchen for cleanliness violations, and inspects the process of making the holy food.
Most of the gefilte fish made in the United States is processed in a small plant in Louisiana (Larry the Cable Guy just did a show about that...he focuses on uniquely American things). The gefilte fish, there, is made of carp. Carp is a bottom-feeding fish, so thought, by some, to be less clean than other fish. Carp life about 25 years, and goldfish are in the carp family.
Jews don't eat shellfish, and some times of the year, there is red tide (which causes fish to be poison). I think that it is likely that Passover (marking Jewish houses so that God would not curse them by killing their kids) was really about Jewish kids surviving red tide shell fish by not eating it. Egyptians thought that it was a Jewish curse meant to kill off their first born sons (who likely had the pick of the best sea food).
Jews are often blamed for surviving eras of bad food (they survive while non-Jews are poisoned by eating poisonous foods that their dietary laws don't prohibit).
Jews are allowed to eat most insects.
Some balk at Jewish ceremonies that involve swinging a chicken around one's head until its head falls off. If the chicken is not eaten afterwards, it amounts to a bloody animal sacrifice. Yet, it is a remembrance of quickly and humanely killing a chicken, and it is one way of eliminating the blood in the chicken.
Blood in meat tends to rot it quickly. Thus, kosher and halal meat lasts a lot longer. Muslims were experts at transporting foods across burning desert sands on camel caravans, and that kind of exposure to elements would surely harm food if not protected. Additionally, the quick removal of blood eliminates adrenaline, which tastes bad. The blood in the meat makes the meat taste worse.
It was Irish tradition to serve bacon and lettuce intentionally wilted in the bacon grease on Saint Patrick's day. But, when they came to America, they noticed that bacon was terribly expensive. So, instead, they used cheap Jewish corned beef and cheap cabbage, and that became the new Irish tradition.
Many of the old recipes taste salty or pickled in vinegar. This is because those were preservatives in the days before refrigeration.
Some Arab delicacies (goat eyeballs or goat testicles) seem off putting to Americans. As Cody Lundin (Dual Survivors TV show) pointed out, Americans have an aversion to eating insects or worms that many other cultures don't. I explained to Cody that I could survive on a tiny plastic card (charge it at a bed and breakfast...room service).
Jews also stay healthier by getting a bris (slicing off the foreskin around the penis). If you are unfamiliar with Jewish traditions, I'd advise that you don't eat a small meat hors d'oeuvre when you are attending a bris.