The intent is the most difficult element to determine. To constitute genocide, there must be a proven intent on the part of perpetrators to physically destroy a national, ethnical, racial or religious group. Cultural destruction does not suffice, nor does an intention to simply disperse a group. It is this special intent, or dolus specialis, that makes the crime of genocide so unique. In addition, case law has associated intent with the existence of a State or organizational plan or policy, even if the definition of genocide in international law does not include that element.

Importantly, the victims of genocide are deliberately targeted - not randomly – because of their real or perceived membership of one of the four groups protected under the Convention (which excludes political groups, for example). This means that the target of destruction must be the group, as such, and not its members as individuals. Genocide can also be committed against only a part of the group, as long as that part is identifiable (including within a geographically limited area) and “substantial.”

--https://www.un.org/en/genocideprevention/genocide.shtml

Colloquially, it's genocide, but legally it does not appear to be. And that's a problem if you're trying to charge Israel with genocide in a court of law. Inevitably it's going to be found to not be genocide and that's one more thing Israel can point to. Crimes against humanity would probably been a better route.

It's going to be hard, if not impossible to show in court that Israel, as a policy, is deliberately targeting Palestinians. Showing Isael's actions is resulting in shit tons of civilian casualties seems pretty easy. Maybe there's super secret documents that show it's a deliberate act, but I highly doubt they'd be that dumb if genocide is their intention.