The problem is that even mildly conservative or center-right views (such as gun registration instead of bans) seems to be absent from popular commentary coming out of places like Hollywood. We all know that California is a bastion of hard left, and also having the same state be more or less the source of nearly all forms of media has exacerbated the division in politics. The result is that any right-leaning individual receives the perception that their ideas are under constant attack. And these aren't intelligent attacks, either. It's the Colberts of the world who don't offer any intelligent commentary, but rather just blunt "haha you're a big stupid".
It's driving center-right and others with right-leaning beliefs into the arms of extremists, because from their perspective there is no one else that is offering an outlet for their opinions. It's why, despite Republicans winning all over the nation, controlling nearly every state legislature and federal regulatory body, that Republican voters still feel under siege.
The media of the left is quite literally killing the left inside the US. You can't stop a political opponent by poking fun at and galvanizing its supporters. Otherwise, you've reduced the political landscape to memes and jokes, so you can't be surprised when someone like Trump turns up and memes his way into the White House because it's the lesser evil.
Take the news for example. What's a mainstream right-leaning media outlet? Fox. Alright, name another? Mysteriously missing. But then think about some left-leaning mainstream outlets and you can immediately name CNN, MSNBC, Washington Post, New York Times, NPR, etc.
This is how you end up with people reading Breitbart. They don't have any good options and so the right is being driven towards more extreme outlets for commentary on current events. It's also how you end up with Fox controlling the lion's share of viewership.
The American left currently has a massive advantage when it comes to media output and message control, and yet they keep ceding territory to the Republicans because vast swathes of the country have been driven into propaganda outlets for just a tiny iota of opinions that reflect their own ethics and worldview.