Isolation will unleash a terrible beast that will not stop until it has wiped out half of Europe. Take a look what post-WW1 isolation did to Germany, for example.
Russia needs more Internet access, not less, it helps to fight the kremlin propaganda inside Russia.
I agree that blocking access to a news website would not be a good idea.
But protecting against Russian hackers? Good idea.
Anything in-between is arguable.