I watched but did not finish inglorious bastards because we had to take iur kitten to the vet.
However, I watched and finished District 9 and it was unequivically a banger. I can't reveal too much without spoilers so I will only say this. It primarily takes place in South Africa and the history of apartheid is important to its message.
I also watched Starship Troopers not to long ago and it was a banger too. The history of American imperialism is incredibly important fot this one.
Both of these are very relevant to world events at the moment and watching them now will only do you good