1. It's a $hitty thing to do by this game hog.
2. It sounds like your father in-law wants lots of deer killed and it could've been a matter of herd control. Lots of landowners don't care about antlers.
3. Many landowners are easy going and enjoy the company of their neighbors and locals they've known for years.
4. It also sounds like you had a lot of built of hopes which were misplaced.
5. You might just lose all access by throwing your fit.
6. See point 1.