Why did perceval’s mother take him into the deserted lands and not allow anyone to teach him anything of fighting or violence? she realized that there were too many warriors in her family and not enough people who were scholars. she had lost her husband and six older sons to war and fighting and wanted to save perceval from that life. she was from the country and felt it was a better place to raise a child. she was a vegetarian and didn’t want perceval to be corrupted by others and eat meat.

I think that the answer is: She had lost her husband and six older sons to war and fighting and wanted to save Perceval from that life.

Perceval's father died when Perceval was a small boy. His father was a recluse before his death. He lived in a manor house in the forest after he attained a would from a battle. 

Perceval's mother raised Perceval on her own. She deliberately kept him ignorant from things that he needed to know for fear of him leading a life that would surely end up in his early demise.