I've written about lots of different ways people have tried to inspire solidarity by making a conflict feel 'real' to people in another place, and getting them to think about what that would be like if it happened here. I think this is my favorite so far.
Big kudos to the St. James church, in central London, for the best Christmas decorations ever. In front of their church they built an eight-meter-high replica of the Israeli-built concrete wall that entirely surrounds the Palestinian city of Bethlehem. What I love about this is that no one will think that they "know" what it is like to live with a wall from having seen this, but that it is so incongruous they will certainly stop and notice and think about it, maybe try to imagine what it is like to be surrounded by walls like that, and hopefully be moved to take some action.
Check out this short video to get a sense of it: