Area of sabotage is within NATO waters, flanked by 7-8 NATO countries, and is the main waterway for the russkie navy to the Atlantic and is under comprehensive monitoring by NATO.
While no evidence has been revealed which country is responsible, the russkies were cleared a week or two ago, which is consistent with not wanting to destroy your own infrastructure. Duh.
So doubters, if not NATO [and NATO does only as the US directs], then who? Or are you now going to say it could’ve been mermaids or a sea monster?