The volume of crap is different. Where you used to have a few news sources that were widely distributed and heavily vetted (more people to vet less news) you now have piles of sources and many, notably Fox, only care about who is paying and who they can manipulate and not about the information. The volume of propaganda and distortion vastly outweighs the truth, and people can easily find other people who agree with them and avoid listening to other viewpoints.
I had a friend tell me NASA didn't believe in global warming. I did a google search with him and there were dozens of entries, most looking sort of like official sources and containing nothing factual. The NASA entry was midway down the first page and, obviously, said that global warming is real and stop misquoting us. The truth is obvious if you are looking for it, but if you are looking to win an argument and prove that educated people and liberals are all idiots it's pretty easy to ignore the correct options and go with the many, many other ones. My friend is not an idiot, he's bright and capable, but he dropped out of school early and he's hostile to mainstream "book learning" so he gets manipulated by a lot of these sites that play to his biases.
Problem is a lot of the manipulation is harmful. Not just global warming, but all the crap about taxes. Check the new budget, poor people get "double the tax deductions" so twice zero. Rich people get real money. Once the deficit balloons who do you thing is going to pay it back? The guys who pay off the politicians and the news sources or the guys who got twice zero?
The whole "small government" thing is sort of insidious as well. All those think tank slogans, but the middle class is pretty much a government creation via taxes. Everyone thinks that they are special and they got where they are because of how good they are, but the goal in the US is Putin's Russia, a kleptocratic dictatorship. In Russia there is not much of a middle class, mostly people working for other countries, not many taxes. Just rich friends of the leader, vairous connections, and lots and lots of people who don't have much.
Funny about "the good old days." I suppose they were from 1952-1978 with some exclusions, and the relatively high taxes are a figment of our collective imaginations. Or maybe the real goal is to go back to the middle ages when leaders really had control?