It doesn't. Christians have the freedom to eat whatever food they like.
Romans 14:17 for the kingdom of God is not eating and drinking, but righteousness and peace and joy in the Holy Spirit.
1Corinthians 8:8 But food does not commend us to God; for neither if we eat are we the better, nor if we do not eat are we the worse.
Hebrews 13:9 Do not be carried about with various and strange doctrines. For it is good that the heart be established by grace, not with foods which have not profited those who have been occupied with them.
The Holy Bible is inspired directly from God and it helps all people to know how God wants us to live our lives. The scripture of the Islamic religion is the Koran and the Haddith.
Almost every religion in the world is observed by someone somewhere in the US. If there are any food restrictions for a particular religion, the people that observe that religion observe the food restrictions for it. There is no one religion that would affect the food choices of the country as a whole.
Christianity is the major religion in Australia because the early settlers, who came from the British Isles, were Christians. People tend to follow the religion of the parents, so most modern Australians are Christians just as their forefathers were.
I'm not sure if you want a list, but ethnocentrism doesn't affect religion, it's the people, media, books, etc. that do. Most people do accord with a religion based on where they live, though.
it affected choices by people now wanting to choose what to say do and other things.
the people now face new threats to their livelihood
They are worse off than they were before.
because it just did.
Some people drive to church.
Yes, sometimes some people in your life could affect your lifestyle choices, but, if you feel it is wrong or you have a plan for the future then you are in complete control of the choices you make as to whom you hang around with.
It affects how much people make, the jobs they have, where they live, the choices they make, and how they make them.
By letting them choice their life or religion.