::::Under your proposed title, the argument could be made that any event that has a name should be included.  The Battle of Little Bighorn would be included, as it has a name: the "Battle of Little Bighorn".  The same would be true for the "Bombing of Heroshima" (among a host of other names for that event)... in fact, almost any event could be included as most events are given some sort of name.  The problem is that these are not names that include the word "Massacre".  The key to the compromise that was worked out at the AfD was that the name for the event had to include the word "Massacre".  The current title makes that clear.  If reliable sources name the event as "the X Massacre", or "the Massacre of X" or some variant thereof, we include it... if not we don't.