The election was won by a very slim margin. The core of Trump's support may have been with him regardless but they weren't enough to win. It's the actions on the margin that matter here.
Also, as other's have pointed out, there are a lot of other problems with social media in general and Facebook in particular. Russian meddling in the election is the spark that is lighting the fire but the fuel was already there. (That last sentence optimistic to an extent that might not be warranted).
Also, as other's have pointed out, there are a lot of other problems with social media in general and Facebook in particular. Russian meddling in the election is the spark that is lighting the fire but the fuel was already there. (That last sentence optimistic to an extent that might not be warranted).