For my part, I would never believe people who supported Trump could be sincere in their concern about any form of ethnic or religious bigotry. Everyone wants to find someone who will champion their cause, but I'd rather make common cause with his targets than be alienated from groups he vilifies. In that sense, the worst part of this week's spectacle was having to see Trump tweet about anti-Semitism or the Republican party putting forward a motion condemning anti-Semitism but not the other forms of bigotry they've bathed in. It was hypocritical, it felt like a slap in the face to other minority communities, and was deeply embarrassing for those Jews who felt ambivalent about the whole thing.
And I say this as someone who thinks that someone should only say another individual or group of individuals has allegiance to another country if they are making an accusation. Probably not everyone agrees with me and I am not looking to argue this point though obviously you're welcome. I don't think Ilhan Omar was acting in bad faith, and I wish her well. Maybe she can convince some members of Congress to support policies that benefit the Palestinians. I hope she does.