There was an attempted mass shooting at the Republican practice for the Congressional baseball game back in 2017 [0] that was a politically motivated domestic terrorist attack (per the FBI's report on the incident in 2021). If Steve Scalise (the house GOP whip who was shot that day) hadn't been there with his security detail, a couple dozen Republicans would have likely died that day including Senator Rand Paul and future Florida governor (and the current leading 2024 presidential candidate not named Trump or Biden) Ron DeSantis.
We've had 4 presidents assassinated in our history (Lincoln, Garfield, McKinley and Kennedy) and there were attempts on the lives of at least 3 more while they were president or president-elect (Jackson, FDR, Reagan). There have also been a significant number of attempts on the life of presidential candidates (Huey Long and RFK were assassinated, George Wallace was shot and paralyzed) We also don't know where Flight 93 would have gone on 9/11 if the heroes on board hadn't charged the cockpit and crashed the plane in a Pennsylvania field instead of somewhere in DC. The reason why we haven't had many politicians assassinated lately is largely good luck but also because we now have Secret Service protection for all major presidential candidates.
Words like "scum" and "detest" are also not that different from the way people speak about political opponents here. Every presidential election for at least the past 20 years has involved people throwing words like "socialist", "communist", "fascist" and "theocrat" around to describe the other party's presidential candidate even when those candidates were centrists. There's always alarmist insinuations that we're going to turn into the USSR or Nazi Germany if the wrong political party wins the next election. In reality, the US will be largely the same but always getting slightly worse no matter which party wins the election. The difference between the donkeys and the elephants is that one of them makes things worse faster than the other (but people don't agree which is the lesser evil). I imagine Labour and Tory are probably the same way in the UK (although Truss did seem to be especially terrible at her job even compared to her predecessors).
[0]: https://en.m.wikipedia.org/wiki/Congressional_baseball_shoot...