It says the God of Abraham gave the JEWISH people all that land
That is a lie. The bible says no such thing.
If you actually READ the bible, you will discover that it precisely defines who the promises to Abraham are given to…and it is NOT “descendants” of Abraham in general. It is ONE specific descendant of Abraham…Jesus Christ. Read Galatians 3:16 and 29 and it is crystal clear…those promises belong to Christ and those who belong to Christ.