Who sabotaged the Nord Stream 1 and 2 natural gas pipelines delivering needed fuel from Russia to European countries? Was it the Mercenary Army Program (Secret Space Program)?

This indeed was sabotage and it was done in a clever fashion by the Mercenary Army Program as you envisioned, with clues pointing to other culprits. That is often how they do their work. They might even go to the trouble of creating direct physical evidence implicating a third-party as the culprit, simply to fan the flames of discord and ramp up tensions, animosities, and cries for vengeance. This is a dangerous game and that is why it is being played, because the Extraterrestrial Alliance wants a wider war. You are not yet done with the ongoing conflict between Ukraine and Russia. Many steps are being taken to trigger greater US involvement that is more direct and, if possible, even a nuclear engagement down the line. That is an extremely dangerous potential catalyst for catastrophe should it happen.