History rhymes, except now inversely...
There have been many claims and media statements about "U.S. citizens" who were victims of the attacks, some of whom are still considered hostages.
Apparently the U.S. State Department treats "dual citizens" differently, depending on the circumstances of their residency and their travel. If you are a dual USA-Ukraine citizen and a U.S. resident, and you happen to be traveling in Ukraine for vacation or a short-term work assignment, then the U.S. government considers you an "American" and will exercise whatever diplomatic and even military options are deemed necessary for your protection. But if you are a dual USA-Ukraine citizen and you live permanently in Ukraine, you are considered something along the lines of a "U.S. citizen on paper only," and they basically consider you a Ukrainian for all intents and purposes.
This is really why the U.S. government doesn't care much about the so-called "Americans" who may still be held hostage in Gaza.