There are always Russian ships in that area. That would be like noting that there were American ships near Hawaii.
Yes. But always ships that carry a mini submarine that is perfect for the job?
And, of course, the best evidence is that the Nazis didn't burn down the Reichstag. They only took advantage of the act of a Commie arsonist (we have similar acts in the US where leftist radicals try to burn down public buildings).
Yes. But the larger point is that it's not impossible for a state to 'attack' itself. In 1939, Germany launched a fake 'attack' against a German radio station, staging it to look like a Polish attack across the border, to justify Germany's invasion of Poland. Sometimes states can 'attack' themselves.
Wouldn't it be simpler for Russia to just shut off the gas flow? Yes. But blowing it up serves two purposes.
1. Shuts of Germany from the gas flow.
2. Shows Germany that Russia is capable of anything. Watch out. Think extra carefully about sending military aid to Ukraine.
Are you saying that the Russians could pull this operation off right under the noses of the US intelligence and NATO and they don't have proof with all their intelligence capabilities? And unlike your Reichstag example, the Russians have never used the pipeline attack as a pretext for taking any retaliatory act. It was Old Joe Biden who promised to "end" the pipeline if the Russians invaded Ukraine.
Are you saying it's possible for the U. S. to pull this operation right under the noses of Russian intelligence, even with Russian ships in the area?
Obviously someone did pull this off under the noses of either the U. S. or Russia. Or Both. And it's not like this is impossible. It's not like the United States, or Russia, is constantly observing and recording every meter of the pipeline. It is certainly possible for Russia to do this. And very suspicious that they not only have Russian ships in the area, but the precise type of Russian ship that carries a mini submarine which is perfect for the operation.
Why Russia would not be considered the leading candidate in blowing up the pipeline is beyond me.