the only differences between Biden, Harris, and Trump on Gaza is domestic messaging strategy. They're 100% agreed that the policy of the United States government will be to continue colonization of west Asia and to exterminate any indigenous population that interferes with extracting wealth from the region. the differences in their messaging aimed at imperial citizens is totally divorced from what they actually believe or intend to do: it's just a short-term disagreement about which series of magic words will most effectively pacify domestic unrest so the government can get back to the bipartisan national mission of exterminating and expropriating.

Trump doesn't believe Biden and Harris "support Hamas", he just believes saying those words in that order will best pacify domestic unrest by inciting violent crackdowns against it. Harris doesn't entertain the idea of a "ceasefire" now any more than she did when she was explicitly condemning the people calling for it, she just believes that saying the right words in the right order will cause enough people to feel "seen and heard", then go home and not make trouble.