Liottel,
Would you wear a jacket with a big swastika on the back while you where walking around town? I don't think you would because you would probably be beat up by someone. It might be a symbol the Finnish airforce WHERE proud of, but they where smart enough to stop using it because 6 million people where killed under it.
I'm not exactly a religious person, in fact, I'm a total atheist. That doesn't mean I'm going to swear when there are religious people around because I respect them and I don't want to offend there believes.
Here's an example
Symbol of the band 'Bad Religion' goes here
I don't find this symbol offensive, so neither should you.
That's stupid.
If you know that a certain symbol offends someone don't display it.
I'm not jewish and I'm not offended by the symbol, but other people might be so why would you want to offend them just because, for you, it represents good luck.