Today there's a million thing you can't disagree with in polite company. Climate theory (even the lunatic claims, like that temperature will keep rising until the seas boil or other such drivel), and the associated evil of humans, and the goodness of nature (pointing out exactly what natural selection means is liable to make you persona non grata). Species that can't quickly adapt don't deserve to live. That's what evolution says. But guess what, that's not what anybody means when they say nature. That seems to come from Disney films.
You aren't allowed to deny that alternative "natural" things are good for you, when in fact that's usually flat out wrong. Natural bread is not, in fact, better for you. And yes, fibre is good for you, but fibre in scientific papers is something entirely different from what makes bread brown. Telling someone who believes in homoeopathy that they're, well, morons, is no longer acceptable. In climate "intolerance", at least the scientific side can be said to have the upper hand, but ...
The same goes for cultures. Anyone with a basic knowledge of different cultures knows that every culture has extremely offensive and immoral components. Equality of cultures ... great soundbite ! Except ... we do put our own culture first, and in practice all religions and ideologies except western Christianity promote completely unacceptable. Equality, between men and women, and legal equality between people in society is something uniquely western. Tolerate muslims ... sounds good, until you actually read how the culture works. Look up dhimma, look up devshirme, look up zakat, look up the racist conditions of halal meat, those things are morally reprehensible. Likewise, the structure of Hindu society is morally abhorrent in it's inequality. God forbid anyone mentions that. And God forbid anyone asks a muslim whether they think the prophet is a moral abomination, no matter how obviously true it is. Facts no longer matter.
Another problem is that I've visited Egypt a few years back. Complete intolerance for any differences in opinion is also happening there, and it's doing the exact same thing. Believe it or not, the divergence of society around religion (you can't put it like this in Egypt or you'll get shot, but it's essentially true : ex-muslims versus extremists) is nothing new. It existed 50 years back just the same as today. What IS new, however, is that it's perfectly normal for both sides to violently suppress any sign of the other side where they see it. It's not just muslim extremists being intolerant, the regular kind is just as bad these days, and so are the "non-religous", it's just as much the ex-muslim side. Asking a woman to cover up for a special event, no matter how atheist she felt, was perfectly acceptable. Now it's likely to get you shot. The same happens on the other side. 30 years ago, girls from religious families dated (that they still -sort of- do, in fact they're much more easy to get in bed, both the religious and the non-religious), and they dressed according to the occasion, what they expected their date to prefer. For going dancing religious girls certainly didn't don "traditional" clothing. Today, asking a woman on a date to take off her veil will immediately provoke violence from bystanders, even if the girl herself wants to do it (probably even if she were to take the initiative). This was an extremely normal thing to do 15 years ago. What the fuck. But I'm seeing signs of the same thing happening right here in America.
And yes, the ex-muslims seem to be losing the fight, in Egypt, but it's not over. The extremists have no good alternative, so they're fighting for nothing. Which means either side can't win. Both sides have more than proven they can do a lot of damage before they lose. But why is there a fight at all ? Clearly it is possible to live together, they've fucking done it for 50 years.
We seem to generally feel that anyone is entitled to their own belief, and is allowed to act like a total moron on the matter. And yes, I will call climate "advocacy" just a belief, because the vast majority of people pushing it wouldn't know how to average a temperature series. And you can call in "facts", sure. But the only kind of valid facts are facts that are properly sourced. If you don't know why you believe something and can point to serious publications defending that, it's not a fucking fact.
Where a belief has the majority of the population on it's side, whether it's islam, climate adherents or denialists, socialists, bible-thumpers, communists, ... that majority finds now finds it perfectly acceptable to use psychological and real violence against the other side. Maybe I didn't look around enough when I was younger, but I certainly get the impression things have gotten worse. A lot worse. Because the majority of people are morons, no matter the specific belief they're pushing, you find basic logic errors and inconsistencies a 4 year old could find in pretty much every popular text on any subject, as you illustrate with climate science. WTF. Also, that majority is allowed to invent or deny facts to support their view, and obvious logical errors go unchallenged.
Of course we've also managed to adopt contradictory views in the meantime, and over "large" distances, the adopted ideologies differ quite a bit. And everybody is digging in.
This will not end well.