One of my favorite philosophical tenets is that people will agree with you only if they already agree with you. You do not change people's minds.
Communism doesn't work because people like to own stuff.
You do have to change things as warfare changes.
I really subscribe to that old adage that you should never let the audience get ahead of you for a second. So if the film's abrasive and wrongfoots people then y'know that's great. But I hope it involves an audience.