In rec.aviation.military Mike wrote:
The narration appears to be a slice taken from:

http://pnews.org/art/ussliberty.shtml

Yes, that's the source, spelling mistakes, grammatical errors,
and all :-)
The full story is on the record, and the only two "reasons"
that the Israelis would attack an American ship have been debunked:
- There was no massacre at El Arish, so there was no need to take
out an American ship to keep the massacre from being discovered
- The US knew about the planned attack on the Golan Heights before-
hand, and did not object, so there was no need to stop intelligence
collection to keep the attack from being discovered.