As you correctly point out, and according to the article:

Of course, diverging from Biden on Gaza risked losing voters who supported his policy. But a close look at the survey suggests that risk was low compared to the potential reward. Voters who were with Biden in 2020 and stuck with Harris in 2024 were asked if breaking with him on Gaza would make them more or less enthusiastic about voting for Harris. By a 35 to 5 margin, they said doing so would have made them more enthusiastic to vote for her, with the remainder saying it would have made no difference.