Don't worry - the cyclist will continue to keep their lives in danger by not stopping at stop signs.
With the US out of NATO, USA aggression towards a NATO ally would provoke a response. Also, NATO is not involved with Ukraine. This means that all of NATO can focus on USA aggression. Considering the significant force difference between a non-NATO USA and the rest of NATO, I imagine that nuclear response as an opener is heavily weighed. Glass Washington D.C., then ask if the USA would like to retreat to US lines before they glass NYC. Primary response would be through UK nuclear submarine along the Atlantic.
Trucks often have to use 'engine breaking' or a 'Jake brake' to slow down. Basically, they cut fuel in the intake stroke, changing the engine into a 'compressor' to exchange forward momentum into useless compressed air that gets thrown away in the exhaust. The result is a lot of 'noise' from the truck as it slows down. It's not intimidation, it's a valid way to slow down without excessive wear on wheel brakes. Or, it shouldn't be intimidation. In some municipalities, engine braking or Jake braking isn't permitted.
Already started. https://www.cbc.ca/news/canada/manitoba/elmwood-transcona-conservative-byelection-strategy-1.7326238 They tried to make "Sellout Singh" a thing. It's right out of the playbook of "Dementia Don."
Shame is a bit strong. One might regret that a peaceful solution wasn't available or wasn't explored fully, but one doesn't need to feel shame that armed conflict occurred.