The problem, to my opinion, aren‘t really politics in particular. Politics, mostly recent politics, just tend to amplify a problem, that we see in some other themes, too, they actually are pure opinion. And though I cannot say precisely when it started, but the will to tolerate opinions, that are different to the own one, is diminishing at an alarming pace. Not only here, but generally, and from what I see, in most societies worldwide…
Today Voltaire would be just regarded as a naive goon with his well known quotation „Though you disagree with me, I will defend your right to do so to the death“.
Nowadays slogan is „Who don’t agree with me, cannot think logically, or rather, cannot think at all !“. The own opinion is often regarded as sacrosanct, and politics, at least in a way, are pure opinion.
Many, too many people have forgotten, or maybe never learned to accept other opinions, and cannot bear such an offense, as they obviously regard it. And the problem probably is getting worse, because in the past, you often only had the crackerbarrel to launch to the public, what you regarded as the ultimate truth. Now you post it on the internet, and find not only the handful of folks, that see it that way, too, but you‘ll certainly find thousands of „supporters“, and so you are obviously right, aren‘t you ? Well, there’s the old say about flies and shit, remember ?
As said before, here we not only have this problem with politics. For example, the reasons, that the F-35 threads were regularly locked and constantly needed to be cleaned up, were just the same. Quarreling in a way, that reminded me to the Spanish inquisition, about the pros and cons of an aircraft, that still yet, had more or less no opportunities to show it‘s qualities at all …. just opinions and much degraded ability to stand objections.
Don‘t know about the age pattern here, perhaps we can blame our parents ? At least the younger ones, born around and after the 90s perhaps can defend themselves by quoting to be victims of helicopter-parents, who unintentionally made them believe, that they are the hub of the world, the one-and-only, the solution to every problem…. Sorry for the older ones amongst us, we only can refer to our senile stubborness ….
Of course, all I wrote here is just my opinion !