As someone who is neither a Jew nor a Palestinian, I'm going to take this with a grain of salt, because there is so much mud being slung across from both sides.

There's no need to even take it with a grain of salt. The factual circumstances described in the article are extremely mundane, but the article tries to paint her participation as a problem by supposing that anyone participating in a public event should only do so if they can answer for every disparate opinion of everyone else there.