It's also illegal to deny or downplay the role of the nazis in the holocaust.
Think that's silly?
It's also illegal to have nazi propoganda, from what I recall.
Still think it's silly?
There are a LOT of folks around the world that would deny these things happened, including a certain political leader in the mideast, but a lot of them would incite political upheaval in Germany. Germany has learned from its past, and it has taken steps to insure it does not happen again.
I don't find that silly at all.
I put swastikas on my scale models when I have them, but I don't consider the laws in Germany to be silly.