If it bothers you that much, fix it. Like your mother I was raised during WWII. While we should not forget the horrors of that area, don't you think it is time to move on an not look for things that aren't there? I do not find your quilt offensive at all. Are you over thinking it a bit? A good pattern is a good pattern and the swastika symbol has been around for thousand of years. 1945 my mother took apart such a flag and made me a beautiful dress.