One can be reasonably serious as a person without being fully informed of the situation on the ground in the occupied territories (either in the current moment, or in the context of Israel's continuous efforts to dislodge and dehumanize the Palestinians since 1948). Or without being aware of the modern definition of the term "genocide" (per the very first line in the Wikipedia page, and its usage by the ICJ and countless legal and human rights organizations) to include the intentional destruction of target populations "in whole or in part".

Once one understands enough basic regional history to connect the dots, and is aware of the modern definition -- it's perfectly bloody obvious what's happening.