@cms neuf, Zelensky is protected, I imagine, by Ukrainian special forces who were trained by NATO special forces. A gas pipe, however, can't fight back :))) ;)
and Kiev airport
As far as I remember it was RuSSian paratroopers who tried to take over that airport. Paratroopers are usually a fairly elite forces, but they're not the same as special forces (it may depend on the country, I don't know how it works in RuSSia). And Ukrainians were warned beforehand about the attack on that airport by CIA.
Kostya had forgotten to bring the ammo, Vanya had forgotten the food and Sasha forgot to fill the petrol tank
Special forces aren't the same as the regular army (that's true for any country, not only RuSSia).
The people (if it was done by humans, that is) who would put those explosives on the Nord Stream would likely be technician-divers (or whatever it's called in English) or miner divers from the RuSSian SF frogmen unit, I imagine:
thesun.co.uk/news/19942074/russia-frogmen-commandos-dolphins-guns/amp/