A few blindly accept the WC anyway. Fine. The real significance for America IMO is not the 1960s assassinations themselves but the lost faith in government. Throw in the "best and brightest" no-win political/media quagmire that killed off and maimed tens of thousands of U.S. bravest and you got a sea change in America -- don't forget the hundreds of thousands of Vietnamese civilians killed off and maimed during the war.
Many said the 1960s assassinations caused great changes in America. True there were changes but IMO the great changes were caused by so much government BS. Many of us realized that nobody was in charge! Elements were running wild and getting away with it. We could no longer (perhaps ever) trust the government. Not that the assassins were in the government but what the hell was going on in our Country?
Speaking of Jack Ruby, the Mob-connected nightclub owner, Dorothy Kilgallen a journalist and popular TV figure from "What's My Line?" had interviewed Jack Ruby and was preparing to write what she learned. Her timely death was just one of many coincidences.
From a web site. "On Sunday November 8 [1965], Dorothy Kilgallen was found dead, sitting fully dressed, upright in bed, early in the morning. The New York City Police investigated and the coroner found that Dorothy Kilgallen had died from ingestion of a lethal combination of alcohol and barbiturates."