Bad historians have done this forever, carefully culling information to fit the predetermined narrative that they're trying to present. Don't get me wrong, sometimes this can be done in a way that makes history more entertaining & easier to understand as long as it's highlighted as what it is, but the tenor of modern (particularly American, particularly ) teaching of history is very much a linear, determinate thing: this happened, so then THIS happened, which logically led to that.
HIstory - even recent history - *must* be understood in-context. Frankly, that's what makes GOOD study of history a really hard thing. Monday-morning quarterbacking happens whether the event was last night or 1000 years ago. The people of, for example, Dark Ages Europe are practically aliens from another planet, in terms of how they saw the world; to interpret their choices (or worse, to render moral judgement on their actions) solely through the postmodern view of 2015 would be ludicrous, yet it happens constantly.
"History is written by the winners" has always been true; the internet has simply made it a sport everyone can enjoy. It's no longer academic historians fighting closeted battles over esoteric issues within their field, it's the subject of daily conversation.
Further, with the astonishingly short memory/attention span of the modern American electorate, tendentious people are able to get away with the constant revisionist presentation of events within recent memory.
Hell, half the political conversations I have, the first effort is simply to establish SOME common basis of accepted facts upon which we can even constructively argue.
Idiocracy is truly approaching.