“...you can’t have your U.S. citizenship taken away from you by an act if your parents or the citizenship laws of another country.”
Yes, you can. But you have the right to gain it back at the age of majority.
Can we stop this lie?
See post #33, has links to the INA rules in effect when 0 was born, and updates from 1965 (which just affected quotas).
There are some categories of people where they could lose it and then have to do something at majority to regain it.
See for example section 301 a) 7) and section 301 b)
Other sections of interest:
Section 308
cases where nationals and citizens are different.
Section 309 a) and c) talks about children born out of wedlock.
Also see Section 349
Loss by native born or naturalized citizen.
If I read it correctly, people under 21 would not lose it.