For the same reason Google doesn't participate in remembrance of the British subway bombing (edit: or the Holocaust, or the 30 Years War, or the eviction of Arm

For the same reason Google doesn't participate in remembrance of the British subway bombing (edit: or the Holocaust, or the 30 Years War, or the eviction of Armenians from Turkey, or the deploying of atomic bombs against Imperial Japan), at a first guess. Not to mention, what would they do? Change the 'l' to a tower being knocked over? That would end well.