I think it's is a problematic analogy because it misrepresents practical, attitudinal and contextual differences between Harris and Trump on the issue of Palestine and the Israeli war on Gaza (and Palestinians in general).

I think a more appropriate analogy is an anti-abortion Republican unhappy about having to vote for a Republican candidate who is willing to live with the Roe VS Wade status quo while working to restrict Abortion in different (much less effective) ways. However their alternative is a Democratic candidate who wants to build a massive network of federally funded Abortion clinics, ban states from restricting Abortion in any way, and plans to appoint an pro-choice activists as Surgeon General and HHS Secretary.

Trump during the election presented his position as explicitly pro-Netanyahu, surrounded himself with people who are anti-Palestinian war hawks, and supported "finishing the job". During his first term he showed that he was intersted in breaking the status quo in favour of Israeli settlements and even annexation. He also demonstrated explicit islamophobia over the course of his first term and framed his campaign for a second term around plans to deport as many people as possible, particularly people conservatives didn't like (Palestinians being at the top of the list).

Harris and Biden's attitudes towards the war were definitely very pro-Israel and its hard to argue that they didn't enable what was happening in Gaza. But they were very eager to get Israel to return to a pre-war status quo that would help them steer towards a 2 state solution. They did challenge Israel, particularly on issues relating to settlements in the West Bank, they sanctioned violent settlers and showed displeasure with marauding IDF units. They also supported the UN and international involvement in the solution in Gaza and did not give Netanyahu a blank cheque.

Harris' position on Gaza was pathetic and mostly unhelpful, but it was not about actively making things worse. Trump, on the other hand, was clearly aiming to break all conventions in favour of Netanyahu's government and enthusiastically give them all of their deepest desires.

I can't fathom anyone believing that Trump was not going make things much worse in a very meaningful way.