It's meant to strip citizenship from those who may have lied about their criminal convictions or membership in illegal groups like the Nazi party, or communists during McCarthyism, on their citizenship applications.
While I disagree with denaturalization, I'd accept it if it meant that this reasoning became universal. If you lied while taking an oath that gives you special status, then your special status will be revoked.
Since virtually all Republican politicians lied in their oaths of office to defend the constitution, we could sue to have them removed.
The quote also mentioned Frédéric Joliot.