This post actually began its life as a reply to a comment about how Hebrew unites all Jews, on the FrumSatire blog, until I realized that it was turning into a post. So here it is.
No matter where they lived or what language they spoke in their adopted countries, the lingua franca of the Jews was always Ivrit (Hebrew). Through Hebrew, they could communicate across boundaries far and wide, which they often did, for all sorts of reasons--such as helping each other in times of great persecution--and also in conducting business and commerce.
This, actually, is part of the problem with Israel's personal 'identity crisis' these days. Israel doesn't know if it should be a nation "like all other nations," or a "Jewish" nation. So far, it seems to have chosen the former; and look what that has achieved: almost universal hatred by the entire world, including possibly the president of the United States. How can the world respect Israel and the Jews, if we don't respect ourselves?
Perhaps it's time for Israel and all Jews to try the latter: to be proud of our heritage and knowledgeable in it. To learn our universal language of Hebrew, which would strengthen us and unite us again. In short, to be proud to be a Jew in today's non-Jewish world. And not to be afraid.
Esther, perhaps it is time to go out and find out who you are: go, learn Hebrew!