There was a GQ writer who tweeted something like "You can tell the anti-Semitism because Omar has never condemned Saudi Arabia," and when it was pointed out to her that Omar had literally said BDS should also be used in regards to Saudi Arabia, she simply deleted the tweet and never bothered addressing the point again. Probably both because she was hilariously wrong and prejudicial, but also because her own point equated Israel's actions with Saudi Arabia's, and was probably closer to accurate than she intended it to be.
Omar's stance on this is one of the bravest things ever done in U.S. government (usually a cowardly and privileged collection of people), and to see the Democrats side with the GOP so uniformly is as disappointing as it is expected and illustrative.