No, there is no "right" choice here, if you mean something that is going to benefit Palestine and Gaza in the short term. The vast majority of those who voted against Harris knew that Trump won't be better, but they could not go along with a candidate actively involved in genocide. Plus, they wanted to let the Democrats know that they would pay a price for their treachery. As it turned out, the pro-Palestine vote against Harris had a very clear effect in Michigan and Wisconsin, but it can't be blamed for her defeat.