They can't know because they have a paranoid, ramblish (did you see the recent speech?) geneatric emperror and slave-ish, self desteuctive subservience.
1) it blames the EU, somehow, instead of Russia
2) if by some magical thinking one avoids blaming Russia somehow, the only other possible thing the EU could have done wrong is to have not somehow built a lot more of its own fossil-fuel infrastructure and production, earlier. Which isn't really a strong argument, but if you're trying really hard to avoid admitting that Russia is the problem, and you have a bone to pick about relying more on fossil fuels, that's the only trick in the bag.
https://www.spectator.co.uk/article/europe-s-descent-into-de...
So pushing energy doomerism (Putin's last card, short of the nuclear ladder, to play against Europe) and blaming Europe for Putin's decision to cut off energy supplies (and pipelines!) is just amplifying the Kremlin's message against the West, something that Pilkington seems very happy to do.