as far as we know one of the reasons why we don't go inside gaza yet is that there is info and heavy concern that hezbolla, syria, iran and more will attack too the minute we get inside there.
so while most of our soldiers are attacking there they will suprise us too and will try to conquer israel.

the biggest problem always is the size of our army
we are small in number (around 300-400K) it's not enough, and you cannot trust the air force in a war like that...

this is a huge problem due to small population in a our country