1. her position wrt Israel and Palestine wasn't clear when she was nominated (though I don't think it was all that hard to anticipate, but here we are); (2) the upcoming vote isn't for her nomination to the democratic ticket, is it?

No one is saying they don't wish the practical reality in which we live was better, but we are looking at two realistic choices right now. One choice will not only greatly worsen the situation and almost undoubtedly lead to more suffering and death in the Levant, it is also quite literally the highly preferred choice by Netanyahu. The other has in the past, before soliciting as many US votes as possible, at least displayed a willingness to criticize the Israeli government and modulate US policies regarding it. So I dunno what to tell you. At the end of the day, I'm pro-Palestinians not being murdered, and could give a fuck about signaling on social media, so I make practical choices to facilitate my as-many-Palestinians-as-possible-not-being-murdered preference. Maybe you don't have that in common with me.