>That crowd only seems to care if they can actively oppose Israel or the current administration

Can you think of any motivating reasons for the crowd to focus on Israel specifically? Last I checked, the American government isn't sending billions of dollars of weaponry and political cover to the Iranian government, so that is one massive reason why protesting Israel makes more sense.

>have not made a peep about the thousands of Iranians recently murdered by their regime

I don't protest to signal my moral outrage, I do it to effect change in my elected leaders. It's not my responsibility to devote an equal amount of attention to every injustice — ignoring the cause and effects in that injustice with direct connection to politicians beholden to me — because people like you will find it "disturbing".