“Nevertheless, my previous comment on those who descend from someone who was a Hungarian citizen any time from 1920 on (when its modern day borders came into existence after the first world war) are citizens automatically (and therefore need not naturalize) still stands.”
I wasn’t arguing.
‘Many other countries (especially in Europe) have similar “jus sanguinis” citizenship laws.’
In fact most of the Eastern Hemisphere has “jus sanguinis”. However, “jus soli” — citizenship by virtue of being born in the country — is the rule in almost every Western Hemisphere country.
The US has both — jus soli is in the US Constitution, and jus sanguinis is established by Act of Congress. Canada and Mexico have almost identical laws. (Jus sanguinis is why Barack Obama would have been a US Citizen by birth even had he been born in Kenya.)