A lot of “I / we believed”, but without facts - supposedly intercepts could’ve been made public by now, or at least to numerous commissions that investigated the attack, yet...
Among the many names in that article, that I would have a hard time to believe (not all, and some I don’t know, but some are known anti-Israel) :
Dean Rusk
Clark Clifford (of recent fame)
Robert Dallek
William Odom (of recent fame)
Bobby Inman
War Crimes Committed Against U.S. Military Personnel, June 8, 1967