You have to understand culturally it's very different there. Few factors but one of the main ones is the President has a status, he's the president. Whoever holds that title, they're indoctrinated from a young age on believing a certain infallibility about the title. If the president says something, he's speaking the truth.
Second of all (and this is what scares me for the UK)... You have a variety of news networks. Now, where do we consume most of our info from? BBC. The BBC whilst slated from both left and right does a fairly decent job of appealing to the mass audience and generally fair reporting.
As you get factions of new news channels coming up like Fox etc (and this is now happening in UK next year with a new right wing channel) you'll end up peeling off some people who consume that "general mass" info and giving them slanted views such as Fox etc.
Lastly, the echo chamber that is twitter. This is why politics so polarised. People on the left follow people on the left and consume that info and same for the right. I had to get off twitter couple of years ago it was all consuming for me. Read the Bellingcat Ashley Babbit piece I think @Rorsach shared, shows a clear spiral into the abyss on her social media.
It's radicalisation plain and simple. That's what we'd call it if the person was Islamic. Because it's white people in the US we give them a pass.
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