The country has always been fragmented in varying degrees, this is nothing new and shouldn't be currently attributed to Baby Boomers, but rather to human nature.
How about the following regarding the heated debates over the adoption of the Jay Treaty in 1795:
"For several days, New York City was saturated with handbills urging citizens to gather at City Hall (Federal Hall) at noon on July 18 'to deliberate upon the proper mode of communicating to the President their disapprobation of the English treaty.' Boston citizens had issued a blanket condemnation of the Jay Treaty, and Hamilton feared a bandwagon effect. Already leaders of the Democratic clubs were delivering heated antitreaty speeches on Manhattan street corners. To devise ways to blunt the gathering, the business community summoned a meeting at the Tontine Coffee House on the night of the seventeenth at which Hamilton and Rufus King endorsed the Jay Treaty. They appealed to supporters to show up at City Hall the next day and stage a counter-demonstration.
As the clock tolled twelve the next day, Hamilton took up a position on the stoop of an old Dutch building on the west side of Broad Street, right across from City Hall. More than five thousand people had squeezed into the intersection where George Washington had taken the oath as president in 1789. But the scene of concord six years earlier now witnessed one of the uglier clashes in the early republic. From his stoop, Hamilton shouted out and demanded to know who had convened the meeting. The irate crowd shouted back in response, 'Let us have a chairman.' Colonel William S. Smith, John Adams's son-in-law, was chosen and presided from the balcony of City Hall. Peter R. Livingston began to speak against the Jay Treaty, but he was brusquely interrupted by Hamilton, who questioned his right to speak first. When a vote was taken, the vast majority of those present favored Livingston, who resumed his oration. But there was so much heckling, such a tremendous din of voices, that Livingston could not be heard, and he suggested to treaty opponents that they move down Wall Street toward Trinity Church.
Not all treaty critics drifted away, however, and about five hundred listened in a surly mood as Hamilton began his ringing defense. According to one newspaper, Hamilton stressed 'the necessity of a full discussion before the citizens could form their opinions. Very few sentences, however, could be heard on account of hissings, coughings, and hootings, which entirely prevented his proceeding.' This was a remarkable spectacle: the former treasury secretary had descended from Mount Olympus to expose himself to street hecklers. John Church Hamilton contends that when his father asked the demonstrators to show respect, he was greeted 'by a volume of stones, one of which struck his forehead. When bowing, he remarked, 'If you use such knock-down arguments, I must retire.' Federalist Seth Johnson confirmed the tale: 'Stones were thrown at Mr. Hamilton one of which grazed his head,' while another indignant Federalist said that the 'Jacobins were prudent to endeavour to knock out Hamilton's brains to reduce him to an equality with themselves.' Before long, treaty opponents stormed down to the Battery, formed a circle, and ceremonially burned a copy of the Jay Treaty. When Jefferson heard about Hamilton being stoned in the street, he didn't react with horror or sadness; rather, he was elated, telling Madison that 'the Livingstonians appealed to stones and clubs and beat him and his party off the ground.' Evidently, Jefferson thought this would delight the author of the Bill of Rights."
Alexander Hamilton by Ron Chernow
‘Tis a great rejoinder to a invalid, delusional and intemperate essay by the normally well-grounded and healthy Mr. Hanson.