The United States of America is creating ex post facto laws by insisting that persons born in the United States who lost their citizenship in the past but failed to inform the State Department are now once again citizens who must file income taxes and FBARs in the United States. The US Constitution clearly forbids Congress and the states from enacting ex post facto laws (Article I, sec. 9-10).
That means that if the laws of the United States said you were no longer a citizen when you took on foreign citizenship or when you evaded the draft by fleeing to a foreign country, they cannot retroactively reinstate you as a citizen after the fact against your will.
This is a basic principle of United States law and the attempt to reinstate former US citizens, against their wills, is a brazen violation of the rule of law.
On the violations of the rule of law in the Obama administration, see the American Thinker on the subject.