Kosher means 'fit or proper'.
Kosher food refers to food that has been prepared following the laws of kashrut. The basis for the laws of kashrut is the Torah which provides the general outlines of what is and isn't fit by Jews.
The goal of these guidelines, as is the goal of all the guidelines found in the Torah, is to provide Jews a guide to living a righteous and good life. These guidelines apply only to Jews though as there are different paths for different people.
the orthodox still believe in kosher because they are very strict and religious so the read the bible and it says in the bible to have those food laws.
Jews are only able to eat kosher food because it is against their religion to eat non kosher food.
Kosher food is not like a specific food. It is not like Hamburgers or anything. SOme foods are kosher and others aren't. Since most people eat all types of food, you can't really avoid eating kosher food.
The word kosher means 'fit'. When describing food as kosher, this means that the food in question is considered fit for eating by religiously observant Jews. Many people believe that food is made kosher when a Rabbi blesses it, however, this is false. In order for food to be kosher, the food has to be prepared following the laws of kashrut. Food that is not prepared following these laws cannot be made kosher after the fact.
Religiously observant Jews will only eat kosher food.
The food has to be kosher.
Religious Jews eat only kosher foods. Gluten is an ingredient in food.
Jews who eat non-kosher food are in violation of the laws of their religion.
Religiously observant Jews will not eat any food that is not kosher. The basis of kashrut is the Torah, this is a part of the guidelines for living righteously given to the Jews by HaShem.
So Orthodox Jews can eat it.
There is no issue with Jews eating vegetarian food. However, religiously observant Jews would require that the food in question be kosher.
All Jews are required to eat kosher. Some choose not to because they believe it's not important anymore. Gentiles are not required to eat kosher but Jews believe that all people, including gentiles should not cause unnecessary suffering to animals.