"doing it over and over again", you mean war moves around and not restricted to same 1 square kilometer.
and what kind of ethnic cleansing it is, if all population remains in gaza.
the trick is, to shift goalposts. if you bomb city with population: genocide. if you order people to evacuate it's ethnic cleansing.
if you want to see how ethnic cleansing actually looks, i'll suggest to take a look at what azeri did a while ago.