Come off it mate. The bible contains some facts and a lot of fiction. References to Abraham wer probably written down many hundreds of years after his life, if he existed, and may well just have been made up in order to make a claim on the land. That sort of thing happens all the time in national mythologies. Evem IF Abraham bough this and it's a very big IF, it has no bearing whatsoever on who owns it today. If you remember we Brits owned Hebron, but we don't claim that gives us any right to it now.
12 Iraqi troops, militiamen killed in multiple ISIS suicide attacks (AP)
from the article: Education Minister proposes student trip to Hebron holy site