I do not think that Arabs in Michigan voted against her because of Israel. I think people make their votes based on the variety of factors, and not a single one.
Plus, if I can be less than subtle, muslim Arabs are antisemitic and strongly anti-Israel. They are not pro-Palestinian. The big difference being that do not want Palestinians to have a good life, you will have big problems bringing the conversation to that. They want to eliminate Israel by pushing the Palestinians into misery and using them as a weapon against Israel. Sorry, but that's the reality of Arabs' political position on Israel/Palestine. They are not looking for compromise here. They are not looking for peace.
This viewpoint does not match in the slightest with Kamala Harris or any part of the democrat party as a whole, in fact it's almost the direct opposite. It has the most overlap with extreme leftists ("tankies") and republicans (because of their viewpoint social issues, LGBT, repression of viewpoints, ...), and while everyone is 100% accurate to say republicans absolutely don't share this opinion, they just want to use them for votes, it's still by far the biggest overlap.