UPDATED COMMENT: Wikipedia says the 1967 attack on the U.S.S. Liberty was "a mistake due to Israeli confusion about the ship's identity," according to both U.S. and Israeli governments. (Though they also note people who question that conclusion...)
Public wiki's may be subject to alternate reality. [1]
Uh-huh. The official story two very trustworthy sources on the matter. The coverup and silencing of the survivors and threats to their persons and families if they attempted to tell their stories are probably just coincidences.
Might be an attempt to correct history after the bad fact. There are huge budgets nowadays set up to correct public opinion, e.g. https://www.timesofisrael.com/foreign-ministry-to-receive-ma...
Edit: a more recent article mentions a budget of $730M:
https://www.timesofisrael.com/israel-just-quintupled-its-pr-...