Imagine if non-state actors could make relationships between any two states bitter. They could do that conceivably now. For whatever gain. For instance country A attacks third world country B. country B's sympathetic hackers hack country A from country B and force them into a confrontation. Who is working for whom? Who actually knows. We're in that sort of cyber punk era. Like for instance hackers from the Ukraine could do some shit to Russia as retaliation via attacking US targets from Russia or vice versa. Whatever two states are suspecting of each other could be exploited. Major actors have already been playing these sort of games, now they are available for pretty much anyone to exploit.
tl;dr You average Joe hacker can now potentially start wars from his mother's basement.