Immigrants are often very unreliable witnesses with respect to life in their original countries. So you maybe ignorant but immigrants may not be objective and have all kind of incentives to exaggerate or even lie about the countries they left. I have seen immigrants going out of their way to be more American than actual Americans.
Yeah, I'm sure Lieutenant Colonel Vindman misses the old fishing hole back home where he went with his dad, those weekend shopping trips with mom, playing sports with his brother, all his schoolmates ... his loyalty to the USA is probably outweighed by those memories.
Oh, wait... he was three fucking years old.