Understood, I still don't fully buy the analogy though, if someone said they were being verbally abused at their job I would give this a higher probability of b

Understood, I still don't fully buy the analogy though, if someone said they were being verbally abused at their job I would give this a higher probability of being true than being verbally abused, for racial reasons, in front of everyone, using slurs from a different era, etc. As you add more conditions the probability tends to zero :). Once you say it was happening in front of more people who weren't reacting, and this was happening on a regular basis, and this was happening in one of the biggest car companies of a country, where a big percentage of the population would never tolerate anything remotely like this, then I'm going to ask for that evidence which you surely already have, since at the very least there must've been many witnesses.