what is the significance of jorge de burges in relation to 14th century christianity

Your question is pretty detailed for this short answer space. I can give you a general coment. Jorge is the villain of the story, the oldest monk living inside the abbey. Jorge is also one of the most intelligent monks inside the abbey, knowing various ancient languages and being able to manipulate the librarians to listen to him and do his bidding. Jorge is the one who smeared the poison onto the pages of the forbidden book, being involved in the deaths of everyone killed at the abbey. Jorge dies at the end when he eats the pages of the book he poisoned.