For those finishing Kesubos, before you get ready to dismiss the “shalosh shavuos” gemara (Kesubos 111) as aggadita, take a look at the Aruch haShulchan C”M 2:1 who writes l'halacha that the Jewish community should not participate in or tolerate those who incite rebellion against the government, as this is a direct violation of one of the shavous! Was the Aruch haShulchan just throwing this in to make a good impression on the censors, or provide some apologetic cover? Nothing else in the siman seems to cry out for a patriotic pledge at this point, so who knows.
When I mentioned this to my wife she asked whether a Jewish person would be prohibited from participating in the type anti-war or civil rights protests that were common in the -60s (and far less common now). My initial reaction was that protest is not a form of rebellion, but a demand for a change in government policy, and is protected by the law itself within our democratic system. But can we say the same of civil disobedience, openly disregarding the law of the land? What should we make of the famous picture of A.J. Heschel marching alongside Martin Luther King in Selma? Another example my wife thought of: July 4th should be assur as it celebrates a violation of one of the shavuos! My hunch is that we have to draw some line between civil disobedience as a protest against specific laws and civil disobedience of the type practiced by Ghandi or advocated by Thoreau that is intended as a rebellion against and rejection of the sitting government. I don't really know - anyone know of good reading on this topic?