It can because it is said to have have beef fat in it.
It can depend on the level of vegetarianism, so yes and no. A vegetarian who still allows for dairy or egg products in their diet could probably eat peanut butter. But some companies add butter into their peanut butter, and taht is a dairy product. So those who don't allow for dairy products might have to chose a vegan peanut butter brand instead.
No, vegetarians do not eat any kind of meat.
everyone except vegetarians or people who might be allergic in some way
Lacto vegetarians eat dairy products. I have seen some lacto vegetarians binge on ice cream! (not recommended)
Unacceptable is not an accurate word to define a law. What do you want to mean by unacceptable ?
Beef that is firm to the touch is an unacceptable characteristic.
Most butters I know are suitable for lacto vegetarian (the most common type of vegetarian) however you should double check that the one you want is a some may contain animal fats. I hope this helps.
Yes, but not in large amounts as it might get stuck in their throat or they might get sick.
No. Some may be vegetarians (herbivores) but most will also eat insects, worms, or meat.
True vegetarians eat none at all. Some avoid red meat only, but are not vegetarians in the strict sense of the term.
Some are, but many are not.
Some ingredients listed as started with E (like E102) are not suitable for vegetarians because they are derived from insects. These ingredients are usually colourings.