With that said, is modern Israel filled with Abraham's decendants. I don't know because when Christ died for our sins, Israel became a spirtual condition, not a natural order. Galatians 3:28-29 "There is neither Jew nor Greek, there is neither bond nor free, there is neither male nor female: for ye are all one in Christ Jesus. And if ye be Christ's, then are ye Abraham's seed, and heirs according to the promise."
Since Islam is a religion that is very hostile toward Christianity, and Israel welcomes Christians and sees them as friends and allies, I tend to believe the right people currently occupy the "promised land".
It certainly is.. Of course you know that Abraham had lots of sons by Hagar as well as his wife Keturah and he circumcised all of them.