Haley literally sharpied the words “finish them” on materiel being sent to Israel.
Go back over the past couple of months. Take a look at how many people in this sub alone have advocated voting for Trump over Biden because of Israel? How many people in states like Minnesota are threatening to do the same thing? For reasons that I still completely fail to understand, the number of people who claim to be willing to vote for Trump (or at least stay home, acknowledging that it would indirectly help him get to office anyway) is above zero. And even if 90% of them have absolutely no intention of following through and just want to “send a message”, the 10% that do may very well be enough in some of these swing states where Biden won by only ~10k votes, give or take.
Even with Haley’s sharpie (What is it about Republicans that makes them think just taking a sharpie to something actually changes anything?), she’s still at worst a “more sane” version of Trump, which may be enough to make some people who would have otherwise held their noses and vote for Biden vote for Haley instead.