Morrocan party accuses US of supporting Israel in attack on Palestinians

If by "party", they mean an actual party, a celebration of some sort, then it was a fairly large one. If they mean a political movement, however, 300 people isn't a particularly impressive number. Heck, I can probably get a couple hundred people to protest American foreign policy without even trying, and I live in Alabama.

At any event, if they mean that the US supports Israel in general, then sure we do. Proud to do it. If they mean we support their specific action in the assassination of Salah Shehadeh -- as it appears -- that is not true. It's been condemned pretty strongly by the Administration.