This is, of course, incorrect.
First, Giffords, whose father is Jewish, is not technically Jewish. Giffords apparently decided to be Jewish about 10 years ago but did not convert.
Second, there have been a number of actually Jewish females elected to the House of Representatives, at least as far back as Florence Kahn of California in the 1920s.
You have a lot of nerve trying to inject facts into the media meme. /sarcasm>