Jacob did not consider his lies to be harmful and in fact helpful for people to believe in life. Things were starting to look up, relatively speaking. People started to enjoy everyday much more and look forward to what radio has to offer. Some people even started to draw some conclusions out of what Jacob has told them. Then of course the Nazis find out about the radio and things get bad.
Someone has to pay for the crime that has been committed.
There is a bit more and some things happen that are not pleasant to watch and are very sad. Well, the whole movie is sad, but Jacob seems to humor us a little bit with the couple of witty phrases. The movie is nice to watch, but one has to definitely be in that certain mood to watch it. It is not a comedy about war, but the actual events that probably happened in various parts of Europe. This is an all star cast.