If the last two years have taught us anything, its that Russia is a wonderfully useful boogeyman who can be used to cover domestic political failures.
Please watch some Russian TV for even just two minutes. The West/America is always their boogeyman, so I guess the West is returning the favor. The people there have yet to hold their own despotic elite accountable. The smart ones who save up emigrate and add to the brain drain. Hence why you find so many Russians in UK, Germany, and America in the first place. It's only now the UK is picky about letting Russians in. Roman Abromovich owns Chelsea football team and couldn't get a visa.
With Brexit boiling up and threatening Prime Minister May and the Tories, the need for a distraction is critical.
And Theresa may can't be fully trusted....