I agree with both ianess and Pippa68.
Completely personally, I do gain strength from observing the memorials and reminding myself what others have gone through. I've lost two friends in the last two weeks, and I like to take time out to remember them and mourn their loss. To lose someone so publicly must be very hard and my heart goes out to them, and to everyone in mourning, and everyone who's friends or family have been taken away from them too soon.
But also, I don't know what ianess wrote originally, it was obviously deemed a little insensitive, but I agree with his/her point. I have enough sympathy in my heart for the normal families who's countries are currently war-torn and who are also losing people left right and centre at the moment. We should not forget them either. I hate the idea of more lives being destroyed by resentment or bigotry on any 'side'.
Somebody once said that the best thing that could happen to this planet would be for aliens to attack, so we would stand together as human beings.... is it really going to take that?