As far as I know many democrats voters are unhappy with the current situation in the Gaza strip and the other occupied territories. I guess that they view negatively Biden's inability to constrain the Israeli actions. Trouble is that on the other side Trump is such a staunch supporter of Israel that he moved to Jerusalem the US embassy and he de facto recognised the annexation of territories occupied in 1967 and still considered occupied territories by the UN.
How is that affecting the way they view the two candidates? Voters unwilling to vote Biden for this issue are now confronted with a harder choice.
Note: I did some research online and I found only some opinion polls containing misleading questions. I would like to understand better the reaction of voters trapped between two evil choices.