Consider how out-of-touch vast swathes of Americans are on foreign affairs, or even on domestic affairs, and it's pretty reasonable IMO. I suspect a major chunk of the people answering this don't even know that anything significant has changed in the past few months and this "genocide/not-genocide" answer is just based on their vague general knowledge of the usual Israel/Palestine interaction.
Frankly, I think 1/3 answering "genocide" sounds positive to me. That's enough to perhaps make some politicians think "maybe I can't wholeheartedly throw complete support behind Israel and not have to worry about it having an electoral impact this time."