I agree. I think there was more political violence in the '60s-early '70s than there is today. The Weather Underground disbanded in 1977, but I think you could maybe go all the way up to the MOVE bombing in 1985 as maybe the last "60s-style" act of political violence. Of course the violence around the Civil Rights movement and the Vietnam War get "above the fold" coverage whenever anyone talks about that era, but if you're queer, you might throw the Stonewall Riots and the White Night Riots after the assassination of Harvey Milk into the mix. Between JFK in 1963 and Milk in 1979, I wonder how many important social and political figures were assassinated?
(In retrospect, the Rodney King riots in 1992 feel to me more like a precursor of the George Floyd demonstrations than it does an extension of the riots of the '60s. The Oklahoma City bombing and the Unabomber feel disconnected, to me, from any larger movement or moment in history. For me, the Oklahoma City bombing was so jarring in part because it seemed to just come out of nowhere.)
Violence aside, I think the divisions around the Vietnam War, the Civil Rights movement, and 2nd-Wave Feminism in the '60s-'70s was at least as polarizing as political & social issues today. My own family had a moment of dissension before I was born - my mother and her father didn't talk for about a year, according to family lore - and I imagine a lot of other people's did, too. I remember Willie Nelson saying in an interview not too long ago, "in the '60s, the major difference between folk music and country music was how you felt about the Vietnam War."