Is it possible to use a chest freezer as a refridgerator?

No. The food will freeze. Also, It depends on what you put in the freezer.

You cant put fruit that you don't want frozen in there.

No, a freezer is a freezer even at it's lowest temperature. How about planning meals together, preparing them together - hence, no oddly consumed food products meant for other dishes. Do slow cooker meals that they can't pick at while it's cooking.It seems they have survived this far without your help.

De the food you think will tempt them.

Your in-laws sound selfish, childish and petulant. Just ask them what they want for dinner and do that, then if they complain then it on their heads. You do not need or deserve this aggravation.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.