Such information often comes from the quickly-growing number of fake news sources.
Um, fake news sources, like the New York Times have existed for at least a century and probably for as long as news existed. If anything is different in 2016 it’s that it’s becoming easier to check them and find out that their false.
Without intervention, these outcomes will most likely grow worse over time, as future politicians learn from the results of the 2016 election season and double down on this strategy of lies and manipulation.
Um, the candidate of lies and manipulation lost.
In this case, the commonly-shared resource is trust in our political system and a basic expectation of truth-telling, together with a strong expectation that politicians will back away from lies when called out. We have seen this resource gobbled up in the 2016 election season by the Trump campaign.
Um, I thick your confused here. It was the Clinton campaign that was doing things like encouraging BLM with misleading statistics and outright lies.
Is it in fact misguided? Certainly looking at the OP the impression appears to be correct.