These arguments always attribute causality to someone with very little agency in those situations and minimize/victimize the actions of someone who did something problematic.
Let’s walk through it…
Person A says something bad (your ‘off color joke’)
Person B dislikes that and says so on the internet, loudly
Person C sees what B said and decides not to hire A
Your argument is that B is more responsible for Cs actions than A or C is. This particular brand of American individual freedoms is bought into by one end of our political spectrum in particular and is nonsense.