Who knows what inner factions are forming, or perhaps are just imagined to form by a paranoid inner inner circle. If the group that considers themselves too deeply invested in the war for reversal believes that there's another group forming around the idea of switching the gas billions back on, the former might very well want to remove that option.

Russia has probably been in a civil war for quite a while now, a backroom civil war of the elites with the TV-controlled masses completely uninvolved. Think of all those mysterious hospital windows falls... gas pipeline sabotage fits right in.