As a German, I think

1. adding contracts with Russia to lessen dependency on the US at the time it was done was a good idea
2. the way it was done, specifically with the Nordstream pipelines was incredibly corrupt and lots of people should be in prison for that, including Gas-Gerd
3. it's very likely Ukraine did destroy the pipeline
4. if so, the US absolutely helped them in their own best interest
5. I don't blame Ukraine at all - it's a legitimate military target to cut off the streams of revenue used by Russia to murder Ukrainians
6. the German government is too chicken-shit to call out the US on any possible involvement
7. the German government is corrupt as fuck and therefore will prosecute Ukrainians involved in a show trial to justify paying reparations to the affected fossil fuel industry in Germany out of the pockets of the German tax payers
8. • if true as reported - that the 2nd Ukrainian national who was allegedly arrested while consulting a US firm on a movie production about the pipeline destruction is a moron for that last bit and I have no sympathies for them

Like... Yes, destroy the pipeline by all means, but if you then feel like you need to gloat about your inside knowledge to a movie production team of all people... well - in that case don't be surprised if you get arrested.

I don't blame them for doing it and then denying it. This is war. Who knows maybe they even got help from the US. European dependence on Russian gas is a huge leverage for Russia that Ukraine and US is not going to support.