Between 1860 and 2010 there were a reported (by Israel) 3,971 Israeli civilian casualties of terrorist attacks.[1]
Between 2000 and 2012 there were a reported (by Israel) 3,034-3,726 Palestinian non-combatant civilian casualties of IDF operations.[2]
Obviously, tank battles in Sinai are not going to produce the same casualty rates as wars of attrition fought at street level in densely populated cities. Air strikes on Gaza (10,000 people / km2) are precisely on the same order of devastation though. The broader you make the context, the more you mask that fact.
[1] http://en.wikipedia.org/wiki/Israeli_casualties_of_war
[2] http://old.btselem.org/statistics/english/Casualties.asp