The important thing is to remember. Too many terrible things have been forgotten. Memorials just become part of the background, and we forget why they are there, but they stand as witnesses that can speak out and awaken people's curiosity about what really happened.

The Memorials for the Great War and World War II, in every village and town in countries in Europe, with their lists of local people with local names, whole families sometimes, still speak to us, if anything even more clearly.

The students at Kent died because they protested at what they saw as a cruel unjust and illegal war (and most people around the world would agree with that judgement, I believe). As Whistle Stop points out, some of them weren't too cool and collected in their protest. After they died they were libelled and insulted by a lot of people. It's something that needs to be remembered.