I don’t know the truth of the matter and Seymour could be right. We just can’t tell from the evidence provided.
How so? The pipeline(s) was/were already off, so the US and Norway already had a new customer because of this. If the US risked blowing up the pipeline(s) (which was already not delivering,) it would put NATO in jeopardy which is explicitly against US interests and WAY more valuable than natural gas. The entire theory doesn't even make sense from the standpoint of US needs/wants.
And EU industry very much depends on low cost gas (chemical manufacturing, vehicle and other industrial manufacturing, greenhouse heating, etc). There’s report after report of vital industrial facilities shuttering due to high gas prices.