Israel actions do support that. What else would happen if Israel completely erased Palestine in a few months? Do you think a single government would support them? The US would break ties overnight .
Genocide doesn’t mean instant or even quick eradication. It can by systematic and slow. Calculated, walking a fine line so they can call it something else. It can even be eugenics, stopping future generations.
There are people in Israel who want to iradicate Palestine, and are very open about it. Some Israeli gov officials are saying similar things. Anyone in the government with half a brain isn’t going to openly state they want to bomb a country out of existence. But we can look at the evidence and see that thie goal is to take that land for themselves and drive out the native population.