No, she's a bigot echoing typical antisemitic tripe. I seriously doubt Congresswoman Lowey ever became an Israeli citizen. Shes an American citizen who happens to be a Jew, which to some connotes disloyalty. Like Catholics, who we all know are loyal to the Pope. Fortunately that bias has largely disappeared.
As to dual citizenship, that's a function of the other country, not the US. A Mexican moving to the US legally, and becoming a US citizen is still a Mexican citizen. It would be nice if they renounced their Mexican citizenship, but that's not always possible. As in the draft dodgers who fled to Canada. They could become Canadian citizens, but the US would not allow them to renounce their US citizenship. Which would have been convenient to avoid prosecution. Many countries place restrictions on renunciation, or don't allow it at all. Since Ilhan is talking about Israel, an Israeli citizen can only renounce citizenship for a brief period before (after?) reaching 18, or after reaching an age, around 40, mandating military service. I don't believe Cuba allows renunciation at all. In many cases dual citizenship is simply accidental, by birth or immigration.
Since we're on Ilhan, a quick look appears to indicate that Somalia has allowed dual citizenship since 2012. I don't know their laws, but it's quite possible she's a US-Somalia dual citizen. Wonder if she's renounced.
My point is a person should not be allowed to vote in two places. I'd add that anyone in elected office should not be a dual citizen.
As it stands now, we have people from a lot of nationalities in important US positions who aren't really representing us. Nikki Haley comes to mind.