He's saying Hamas lost a war, that's all that happened. You're making an unrelated point, which is that genocide is often carried out in the context of war. That may be true, but that doesn't make the hoax that Israel's war against Hamas was a genocide any less false.

Israel's war against Hamas was not a genocide. (Nor was it a distinct war, but merely part of the much longer war against the Palestinian people.)

Israel's war against Hamas was part of a campaign of genocide against the Palestinian people that has been conducted through much of that longer war, a campaign that it started decades before Hamas existed (and fostered the creation of Hamas, during the more intense period of its occupation of Gaza, as a tactic to facilitate through both dividing its opposition and making it less internationally sympathetic, as the primary constraint on the campaign has always been international, and particular US, tolerance.)

A series of unsupported claims.