Fake News
From eyewitness accounts the terrorist attack was clearly a KGB-Putin-Iran-Hamas operation:
“Later, when the gruesome attack was finally over and IDF soldiers managed to subdue the attackers, they searched these trucks and found RPG launchers, high-end communications devices, assorted AK-47s and other mostly Soviet-made weapons, along with numerous copies of the Quran.”
https://www.tabletmag.com/sections/news/articles/israel-music-festival-massacre-eyewitness-account
Hamas = Russian advised, trained and equipped terrorists
Putin’s revenge?......................