From that right-wing news source, The Hill:

Which raises the question of what the real reason was that it was hidden from public view. I think the answer can be found in an earlier set of documents that DOJ and FBI fought hard to keep secret — the text messages of those FBI love-birds Peter Strzok and Lisa Page. What we learned from their messages was that the investigation was a whole lot more about politics and and a whole lot less about verified intelligence.

There is now a concrete storyline backed by irrefutable evidence: The FBI allowed itself to take political opposition research created by one party to defeat another in an election, treated it like actionable intelligence, presented it to the court as substantiated, and then used it to justify spying on an adviser for the campaign of that party's duly chosen nominee for president in the final days of a presidential election.

And when, nine months later, the FBI could not prove the allegation of collusion between Trump and Russia, unverified evidence was leaked to the media to try to sustain public support for a continued investigation.

That means the redaction of Footnote 43 had more to do with political embarrassment than with national security. And that should concern us all.
It should EVERYONE; it won't.  Because a bunch of idiots don't care as long as they think it'll help attack Trump.  Or someone else on the right(which is sometimes "to the right of Stalin")