You can’t really compare. 1967 was a total neis nigla from shomayim. 1973 was also a neis but in both wars we were fighting clear armies.
2008,2012, and 2014 were more like operations than wars. The objective in those Gaza wars was more to make a statement. The major difficulties here are the PR war that Israel is fighting and the fact that Hamas hides amongst civilians and the hostages. For all those who say “just turn Gaza into a parking lot”, that is not realistic. Even getting rid of Hamas is not a realistic objective. The most they can do is get through the skulls of all Palestinians that terrorism has a high price to pay so think about that next time you consider a massacre. If they could dump all the civilians somewhere it would be a whole different story. Problem is that no one wants them.