Every commentator notes how partisan the American public has become. Positions seem continually more extreme, blue is bluer, red is redder, and no one is interested in what the other side has to say.
This may well be true. I live in a genteel blue area, and do know a lot of people with predictable doctrines (and many women I encounter specify adherence to these doctrines as a prerequisite for dating them), but no one seems particularly enraged at their opponents or uncomprehending of their positions.
So that leads to the natural question: what would the period after the Council of Chalcedon have been like if someone in Late Antiquity had invented Twitter?
Chalcedon, in 451, established the Orthodox definition of the nature of Christ, the same definition used by modern Orthodox, Catholics, and Protestants. But some found this an unwelcome compromise. Their position was known (I gather pejoratively) as Monophysitism. Their descendants are Coptic and Oriental Orthodox churches, including the Ethiopian, Armenian, and Syriac churches.
Christological wrangling seems to have fallen out of fashion (I gather it really requires Greek to be clear enough to fight about), and I won't go into the details they were squabbling about here. But they really did take it seriously, and the more heavily Monophysite areas of Egypt and Syria were always in conflict with Chacedonian Constantinople, Asia Minor, and Balkans. They would denounce each other, riot against each other, depose each other's bishops, and write endless screeds against each other.
Periodically, an Emperor would try to do something about it. Zeno came up with the Henoticon, which tried, unsuccessfully to paper over the differences by being unclear about what they were. Anastasius, a pious Monophysite, had no patience with extremists and exiled both overzealous Monophysites and Chalcedonians, finding them both tiresome. Justinian, who knew everything, tried to persuade everyone to an elaborate compromise position involving the Three Chapters (something else probably not worth the effort to understand), but even this late antique Woodrow Wilson was unable to achieve his goal. Justinian's Empress, Theodora, was a fervent Monophysite, and never compromised either.
Anastasius, by the way is one of my favorite Emperors. He took office at age 60, ruled for over a quarter of a century (491-518), and left the Empire (the Eastern Roman Empire by this point) prosperous and with a huge cash surplus, which unfortunately enabled his overactive successor Justinian to finance his endless wars. History tends to overvalue the flashy Justinians and undervalue the "how about we focus on reestablishing coinage with consistent value and stay away from overheated rhetoric" Anastasiuses.
When the Arabs invaded in the early 7th century, they conquered the Monophysite areas, which has been atributed to the inhabitants' hatred of Orthodoxy, but I think this is mostly a matter of geographical chance. It's just that they failed to conquer the Orthodox heartland.
The conflict between Chalcedonian and Monophysite wasn't all in good fun, but it wasn't a civilizational fissure either. Both inhabited a unified empire, honored the same Emperor. and got on with things. If they had spent their days tweeting about consubstantiality, they might have ended up hating each other enough to break up the Empire long before it finally fell to overwhelming force.
So, yeah. I'm with Anastasius. Sure, think those people are clueless idiots, and their doctrines are abhorrent. But we have a nation to run, jobs to do, food to cook, and beaches to lie on with our dates or our families. Dammit, did that seagull just steal my sandwich? That's what I really need to worry about.