The problem is, it's anything but tangential. It flows
directly from the French Revolution, and became a big thing in the US in the cultural '60s, which extended into the calendar '70s, the idea that the menu of solutions for your political problems includes outright liquidation of a subset of your opponents.
How can I consider this to be tangential when our current President started his political career in the home of two of the most notorious '70s figures advocating this, who made a wild guess that 10% of the population could not be reeducated and would have to be liquidated? You might say, people they thought to be "irredeemable". And these are people of Hillary's generation.
I bring this up not to attack Obama, but to show how well received such eliminationism is on the US Left (heck, in one of those things that makes you wonder if there's a God, the man had a feature article in The New York Times on 9/11 (written and printed before the attack, of course), with him standing on an American flag).
That this sort of thing, including Hillary's speech, is not completely out of bounds means I cannot for a second assume the political struggle in the US is not existential for me and my family.
And given that, I can't in the least see how trust can be rebuilt, at least prior to driving out of polite society all of these figures, instead of feating them.
So, yes, it is, and unfortunately has to be a complete derail of the conversation, given that to the best I can discern you're not taking this issue seriously.
Can I ask roughly how old are you? Did you grow up horrified at the mass murders by the tens of millions by the Left in the 20th Century, including by the Nationalsozialistische Deutsche Arbeiterpartei AKA National Socialist German Workers' Party? How the Soviets were poised to kill > 100 million Americans in 30 minutes if they launched their misses and bombers? How Pol Pot's Khmer Rouge (Red Khmers, formally the Communist Party of Kampuchea per Wikipedia) killed off perhaps half their nation's people. How just having glasses was a death sentence, because it suggested to them that you might have a formal education?
What's your opinion on the US crusade for gun control? Is it really about "gun safety"? Has it become something more sinister than the explicit through the 1970s "Keep guns out of the hands of blacks" (and other minorities starting around the turn of the century, but blacks were the foremost target)?