Not every victim of Genocide is killed. Any person who was put in a concentration camp by Hitler, or even persecuted, was a victim of the Holocaust. Similarly any person in Gaza is the victim of a Genocide. And you don’t have to be a Palestinian to empathise with people.
Your scope of analysis is limited to 4 years. There’s no long term analysis. If people vote for Genocide it will cement that Democrats can get away with anything if they fearmonger hard enough.
When people threaten to withhold votes for a Genocide they have to follow through or all the leverage falls away. It’s a game of chicken now.